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Summary of significant accounting policies (Details) - Amount of expense related to share-based payment arrangements (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Jul. 31, 2013
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Jul. 31, 2012
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Jul. 31, 2011
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | $ 545 | $ 719 | $ 1,049 |
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Cost of Clinical Laboratory Services [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | 10 | 10 | 10 |
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Research and Development Expense [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | 2 | 4 | 14 |
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Selling, General and Administrative Expenses [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Share Based Compensation | $ 533 | $ 705 | $ 1,025 |
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- Details
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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