Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net (loss) income	$ (18,485)	$ (21,547)	$ 6,347
Adjustments to reconcile net (loss) income to cash flows (used in) provided by operating activities:
Amortization of intangible assets	724	756	770
Depreciation of property and equipment	91	152	112
Amortization of bond (discount) premium on marketable securities	(9)	87	98
Amortization of noncurrent portion of deferred revenue	(5,585)	0	0
Stock-based compensation	2,456	2,163	1,961
Changes in operating assets and liabilities:
Accounts and other receivables	219	116	(124)
Prepaid expenses and other current assets	(99)	187	(136)
Accounts payable	(346)	626	292
Accrued expenses	650	1,036	1,053
Deferred revenue	(97)	103	(94)
Deferred rent	(9)	5	18
Net cash (used in) provided by operating activities	(20,490)	(16,316)	10,297
Cash flows from investing activities:
Purchases of marketable securities	(5,052)	(17,517)	(10,222)
Maturities of marketable securities	18,743	13,168	3,650
Purchases of property and equipment	(147)	(113)	(161)
Proceeds from sale of property and equipment	33	0	0
Net cash provided by (used in) investing activities	13,577	(4,462)	(6,733)
Cash flows from financing activities:
Proceeds from issuance of stock, net of issuance costs	8,404	16,500	0
Proceeds from exercise of stock options	99	490	235
Net cash provided by financing activities	8,503	16,990	235
Effect of foreign exchange rate changes on cash and cash equivalents	(5)	(20)	(12)
Net increase (decrease) in cash and cash equivalents	1,585	(3,808)	3,787
Cash and cash equivalents at beginning of year	15,313	19,121	15,334
Cash and cash equivalents at end of year	16,898	15,313	19,121
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 0	$ 4	$ 263