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Statements of Cash Flows - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows from operating activities:    
Net loss $ (4,270) $ (4,620)
Adjustments to reconcile net loss to net cash used in operating activities:    
Share-based compensation 737 770
Depreciation and amortization 14 15
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets (910) (94)
Accounts payable (330) (610)
Accrued liabilities (2,005) (1,222)
Deferred revenue 15,537  
Net cash provided by (used in) operating activities 8,773 (5,761)
Cash flows from investing activities:    
Purchases of property and equipment (2)  
Purchases of short-term investments (20,054) (20,125)
Proceeds from maturity of short-term investments 10,023 25,040
Net cash (used in) provided by investing activities (10,033) 4,915
Cash flows from financing activities:    
Net proceeds from issuance of common stock 4,212  
Net cash provided by financing activities 4,212  
Net increase (decrease) in cash and cash equivalents 2,952 (846)
Cash and cash equivalents at beginning of the period 10,837 18,722
Cash and cash equivalents at end of the period $ 13,789 $ 17,876