Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Current assets
Cash and cash equivalents	$ 1,524	$ 552
Short-term investments		3,551
Accounts receivable, net of allowance	41	12
Income tax receivable	429
Prepaid expenses and other current assets	328	161
Total current assets	2,322	4,276
Property and equipment, net	531	733
Deferred tax asset	429
Long-term investments		50
Other assets, net	81	81
Total assets	3,363	5,140
Current liabilities
Accounts payable	139	112
Payroll-related accruals	312	412
Accrued liabilities and other	393	434
Income tax payable	2	2
Total current liabilities	846	960
Other liabilities	156	188
Total liabilities	1,002	1,148
Commitments and contingencies (Note 12)
Stockholders’ equity
Preferred stock, $0.001 par value, convertible, 2,500,000 shares authorized; no shares issued and outstanding at March 31, 2019 and June 30, 2018, respectively
Common stock, $0.001 par value, 15,000,000 shares authorized; 6,176,425 and 4,496,873 shares issued at March 31, 2019 and June 30, 2018, respectively; 5,776,509 and 4,097,346 shares outstanding at March 31, 2019 and June 30, 2018, respectively	190,648	190,570
Treasury stock, 399,916 and 399,527 shares at cost at March 31, 2019 and June 30, 2018, respectively	(4,129)	(4,128)
Additional paid-in capital	5,798	1,745
Accumulated deficit	(189,956)	(184,164)
Accumulated other comprehensive loss		(31)
Total stockholders’ equity	2,361	3,992
Total liabilities and stockholders’ equity	$ 3,363	$ 5,140