Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Current assets
Cash and cash equivalents	$ 633	$ 2,184
Short-term investments	5,647	10,900
Accounts receivable, net of allowance	4	146
Inventory, net	9	166
Prepaid expenses and other current assets	269	269
Total current assets	6,562	13,665
Property and equipment, net	2,618	3,180
Long-term investments	50	1,990
Other assets, net	81	0
Total assets	9,311	18,835
Current liabilities
Accounts payable	124	259
Payroll related accruals	398	907
Accrued liabilities and other	406	641
Income tax payable	2	2
Total current liabilities	930	1,809
Other liabilities	216	256
Total liabilities	1,146	2,065
Commitments and contingencies (Note 13)
Stockholders’ equity
Preferred stock, no par value, convertible, 2,500,000 shares authorized, no shares issued and outstanding, at March 31, 2018 and June 30, 2017, respectively
Common stock, no par value, 15,000,000 shares authorized; 4,505,473 and 4,508,509 shares issued at March 31, 2018 and June 30, 2017, respectively; 4,107,538 and 4,111,281 shares outstanding at March 31, 2018 and June 30, 2017, respectively	190,544	190,382
Treasury stock, 397,935 and 397,228 shares at cost at March 31, 2018 and June 30, 2017, respectively	(4,124)	(4,121)
Additional paid-in capital	1,708	1,483
Accumulated deficit	(179,911)	(170,913)
Accumulated other comprehensive loss	(52)	(61)
Total stockholders’ equity	8,165	16,770
Total liabilities and stockholders’ equity	$ 9,311	$ 18,835