Annual report pursuant to Section 13 and 15(d)

Segment reporting (Detail) - Operating results of the reportable segments

v2.4.0.6
Segment reporting (Detail) - Operating results of the reportable segments (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Jul. 31, 2012
Apr. 30, 2012
Jan. 31, 2012
Oct. 31, 2011
Jul. 31, 2011
Apr. 30, 2011
Jan. 31, 2011
Oct. 31, 2010
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2010
Revenues:                      
Clinical laboratory services                 $ 59,403 $ 52,762 $ 44,178
Product revenues                 37,722 41,830 43,111
Royalty and license fee income                 5,958 7,437 9,793
Total revenues                 103,083 102,029 97,082
Operating expenses:                      
Cost of clinical laboratory services                 36,305 31,682 29,570
Cost of product revenues                 19,668 22,137 22,547
Research and development                 6,293 7,806 9,704
Selling, general and administrative                 47,928 45,191 48,395
Provision for uncollectible accounts receivable                 5,104 4,431 3,480
Legal                 3,724 3,710 1,746
Litigation settlement                     3,698
Impairment charges                 24,540    
Total operating expenses                 143,562 114,957 119,140
Operating (loss) income                 (40,479) (12,928) (22,058)
Other income (expense)                      
Interest                 21 11 19
Other                 77 45 44
Foreign exchange gain (loss)                 (540) 49 (266)
Income (loss) before income taxes (29,074) (3,445) (4,076) (4,326) (4,199) (2,002) (5,562) (1,060) (40,921) (12,823) (22,261)
Depreciation and amortization included above                 4,477 4,469 4,269
Share-based compensation included in above:                      
Share-based compensation                 719 1,049 1,170
Capital expenditures                 1,364 1,223 3,251
Clinical Labs [Member] | Cost of Clinical Laboratory Services [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 10 10 12
Clinical Labs [Member] | Selling, General and Administrative Expenses [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 49 61 78
Clinical Labs [Member]
                     
Revenues:                      
Clinical laboratory services                 59,403 52,762 44,178
Total revenues                 59,403 52,762 44,178
Operating expenses:                      
Cost of clinical laboratory services                 36,305 31,682 29,570
Research and development                 299    
Selling, general and administrative                 20,856 18,426 18,503
Provision for uncollectible accounts receivable                 4,987 4,415 3,432
Legal                 262 387 222
Total operating expenses                 62,709 54,910 51,727
Operating (loss) income                 (3,306) (2,148) (7,549)
Other income (expense)                      
Interest                 (5) (5)  
Other                 28 30 46
Income (loss) before income taxes                 (3,283) (2,123) (7,503)
Depreciation and amortization included above                 1,092 1,012 982
Share-based compensation included in above:                      
Share-based compensation                 59 71 90
Capital expenditures                 921 834 1,728
Life Sciences [Member] | Research and Development Expense [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 4 14 14
Life Sciences [Member] | Selling, General and Administrative Expenses [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 59 84 114
Life Sciences [Member]
                     
Revenues:                      
Product revenues                 37,722 41,830 43,111
Royalty and license fee income                 5,958 7,437 9,793
Total revenues                 43,680 49,267 52,904
Operating expenses:                      
Cost of product revenues                 19,668 22,137 22,547
Research and development                 4,308 5,784 7,202
Selling, general and administrative                 18,305 17,855 19,800
Provision for uncollectible accounts receivable                 117 16 48
Legal                 536 726 145
Impairment charges                 24,540    
Total operating expenses                 67,474 46,518 49,742
Operating (loss) income                 (23,794) 2,749 3,162
Other income (expense)                      
Interest                 23 2 (5)
Other                 27 (3) (8)
Foreign exchange gain (loss)                 (540) 49 (266)
Income (loss) before income taxes                 (24,284) 2,797 2,883
Depreciation and amortization included above                 3,217 3,282 3,110
Share-based compensation included in above:                      
Share-based compensation                 63 98 128
Capital expenditures                 443 389 1,450
Therapeutics [Member]
                     
Operating expenses:                      
Research and development                 1,686 2,022 2,502
Total operating expenses                 1,686 2,022 2,502
Operating (loss) income                 (1,686) (2,022) (2,502)
Other income (expense)                      
Income (loss) before income taxes                 (1,686) (2,022) (2,502)
Depreciation and amortization included above                 43 47 52
Share-based compensation included in above:                      
Capital expenditures                     11
All Other Segments [Member] | Selling, General and Administrative Expenses [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 597 880 952
All Other Segments [Member]
                     
Operating expenses:                      
Selling, general and administrative                 8,767 8,910 10,092
Legal                 2,926 2,597 1,379
Litigation settlement                     3,698
Total operating expenses                 11,693 11,507 15,169
Operating (loss) income                 (11,693) (11,507) (15,169)
Other income (expense)                      
Interest                 3 14 24
Other                 22 18 6
Income (loss) before income taxes                 (11,668) (11,475) (15,139)
Depreciation and amortization included above                 125 128 125
Share-based compensation included in above:                      
Share-based compensation                 597 880 952
Capital expenditures                     62
Cost of Clinical Laboratory Services [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 10 10 12
Research and Development Expense [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 4 14 14
Selling, General and Administrative Expenses [Member]
                     
Share-based compensation included in above:                      
Share-based compensation                 $ 705 $ 1,025 $ 1,144