Annual report pursuant to Section 13 and 15(d)

Income taxes (Details) - Components of deferred tax assets (liabilities)

v3.10.0.1
Income taxes (Details) - Components of deferred tax assets (liabilities) - USD ($)
Jul. 31, 2018
Jul. 31, 2017
Deferred tax assets:    
Federal tax carryforward losses $ 13,975 $ 18,831
Provision for uncollectible accounts receivable 791 1,392
State and local tax carry forward losses 352  
Accrued royalties 102 149
Stock compensation 575 782
Depreciation 581 804
Research and development and other tax credit carryforwards 1,286 2,208
Foreign tax carryforward losses 2,771 2,420
Intangibles 1,811 2,888
Inventory 1,786 2,536
Accrued expenses 1,194 1,420
Other, net 58 69
Deferred tax assets 25,282 33,499
Prepaid expenses (772) (863)
Other, net (39) (55)
Deferred tax liabilities (811) (918)
Net deferred tax assets before valuation allowance 24,471 32,581
Less: valuation allowance $ (24,471) $ (32,581)