Annual report pursuant to Section 13 and 15(d)

Segment reporting (Details) - Schedule of Segment Reporting Information, by Segment

v2.4.0.8
Segment reporting (Details) - Schedule of Segment Reporting Information, by Segment (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2011
Segment Reporting Information [Line Items]      
Clinical laboratory services $ 55,889 $ 59,403 $ 52,762
Product revenues 32,526 37,722 41,830
Royalty and license fee income 5,292 5,958 7,437
Total revenues 93,707 103,083 102,029
Cost of clinical laboratory services 38,251 36,305 31,682
Cost of product revenues 16,584 19,668 22,137
Research and development 3,889 6,293 7,806
Selling, general and administrative 43,654 47,928 45,191
Provision for uncollectible accounts receivable 4,496 5,104 4,431
Legal 5,813 3,724 3,710
Impairment charges   24,540  
Total operating expenses 112,687 143,562 114,957
Operating income (loss) (18,980) (40,479) (12,928)
Interest (54) 21 11
Other 5 77 45
Foreign exchange gain (loss) 80 (540) 49
(Loss) income before income taxes (18,949) (40,921) (12,823)
Depreciation and amortization included above 4,605 4,477 4,469
Capital expenditures 988 1,364 1,223
Clinical Labs [Member] | Cost of Clinical Laboratory Services [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 9 10 10
Clinical Labs [Member] | Selling, General and Administrative Expenses [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 36 49 61
Clinical Labs [Member] | Total [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 45 59 71
Clinical Labs [Member]
      
Segment Reporting Information [Line Items]      
Clinical laboratory services 55,889 59,403 52,762
Total revenues 55,889 59,403 52,762
Cost of clinical laboratory services 38,251 36,305 31,682
Research and development 294 299  
Selling, general and administrative 19,942 20,856 18,426
Provision for uncollectible accounts receivable 4,232 4,987 4,415
Legal 316 262 387
Total operating expenses 63,035 62,709 54,910
Operating income (loss) (7,146) (3,306) (2,148)
Interest (46) (5) (5)
Other 49 28 30
(Loss) income before income taxes (7,143) (3,283) (2,123)
Depreciation and amortization included above 1,377 1,092 1,012
Capital expenditures 757 921 834
Life Sciences [Member] | Cost of Clinical Laboratory Services [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 1    
Life Sciences [Member] | Research and Development Expense [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 2 4 14
Life Sciences [Member] | Selling, General and Administrative Expenses [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 10 59 84
Life Sciences [Member] | Total [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 13 63 98
Life Sciences [Member]
      
Segment Reporting Information [Line Items]      
Product revenues 32,526 37,722 41,830
Royalty and license fee income 5,292 5,958 7,437
Total revenues 37,818 43,680 49,267
Cost of product revenues 16,584 19,668 22,137
Research and development 2,356 4,308 5,784
Selling, general and administrative 15,511 18,305 17,855
Provision for uncollectible accounts receivable 264 117 16
Legal 57 536 726
Impairment charges   24,540  
Total operating expenses 34,772 67,474 46,518
Operating income (loss) 3,046 (23,794) 2,749
Interest 13 23 2
Other (71) 27 (3)
Foreign exchange gain (loss) 80 (540) 49
(Loss) income before income taxes 3,066 (24,284) 2,797
Depreciation and amortization included above 3,102 3,217 3,282
Capital expenditures 231 443 389
Therapeutics [Member]
      
Segment Reporting Information [Line Items]      
Research and development 1,239 1,686 2,022
Total operating expenses 1,239 1,686 2,022
Operating income (loss) (1,239) (1,686) (2,022)
(Loss) income before income taxes (1,239) (1,686) (2,022)
Depreciation and amortization included above 22 43 47
Other Segments [Member] | Selling, General and Administrative Expenses [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 487 597 880
Other Segments [Member] | Total [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 487 597 880
Other Segments [Member]
      
Segment Reporting Information [Line Items]      
Selling, general and administrative 8,201 8,767 8,910
Legal 5,440 2,926 2,597
Total operating expenses 13,641 11,693 11,507
Operating income (loss) (13,641) (11,693) (11,507)
Interest (21) 3 14
Other 27 22 18
(Loss) income before income taxes (13,635) (11,668) (11,475)
Depreciation and amortization included above 104 125 128
Cost of Clinical Laboratory Services [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 10 10 10
Research and Development Expense [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 2 4 14
Selling, General and Administrative Expenses [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation 533 705 1,025
Total [Member]
      
Segment Reporting Information [Line Items]      
Share-based compensation $ 545 $ 719 $ 1,049