INCOME TAXES - Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Deferred tax assets    
Reserves and Allowances $ 836 $ 200
Stock-based compensation 1,168 1,038
Accrued expenses 446 455
Research and development credits 595 345
State tax 824 570
Other 399 353
Total deferred tax assets 4,268 2,961
Deferred tax liabilities    
Basis difference for fixed assets (623) (477)
Other 0 0
Total deferred tax liabilities (623) (477)
Valuation allowance (595) (345)
Net deferred tax assets $ 3,050 $ 2,139