Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (3,006)	$ (3,467)
Adjustments to reconcile net loss from operations to net cash used in operating activities:
Stock-based compensation	122	862
Amortization	12	16
Depreciation	186	171
Net loss on sale of available-for-sale investments	1	0
Changes in assets and liabilities:
Accounts receivable	66	(862)
Cost, estimated earnings and billings, net on uncompleted contracts	0	296
Accounts payable	(59)	29
Other assets and liabilities	(790)	(161)
Net cash used in operating activities	(3,468)	(3,116)
Cash flows from investing activities:
Sale of available-for-sale investments	889	0
Maturities of available-for-sale securities	500	2,592
Purchases of property and equipment	(7)	(24)
Net cash provided by investing activities	1,382	2,568
Cash flows from financing activities:
Payments for purchase of treasury stock	(3)	(308)
Net cash used in financing activities	(3)	(308)
Net change in cash and cash equivalents	(2,089)	(856)
Cash and cash equivalents at beginning of period	2,184	4,399
Cash and cash equivalents at end of period	95	3,543
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Income taxes paid	$ 0	$ 0