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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Cash flows from operating activities:    
Net (loss) income $ (4,933) $ 20,566
Adjustments to reconcile net (loss) income to cash flows from operating activities:    
Amortization of intangible assets 192 196
Depreciation of property and equipment 29 35
Stock-based compensation expense 405 309
Amortization of bond premium on marketable securities 34 18
Changes in operating assets and liabilities:    
Accounts receivable and other current assets 136 (25,323)
Accounts payable and accrued expenses (350) 235
Deferred revenue (8) (35)
Deferred rent 2 5
Net cash used in operating activities (4,493) (3,994)
Cash flows from investing activities:    
Purchases of marketable securities (2,535) (251)
Maturities of marketable securities 2,000 250
Purchases of property and equipment (11) (6)
Net cash used in investing activities (546) (7)
Cash flows from financing activities:    
Proceeds from exercise of stock options 9 56
Net cash provided by financing activities 9 56
Effect of foreign exchange rate changes on cash and cash equivalents (3) (5)
Net decrease in cash and cash equivalents (5,033) (3,950)
Cash and cash equivalents at beginning of period 19,121 15,334
Cash and cash equivalents at end of period $ 14,088 $ 11,384