Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (11,756)	$ (13,434)
Adjustments to reconcile net loss from operations to net cash used in operating activities:
Stock-based compensation	1,134	551
Amortization	20	33
Depreciation	711	525
Net loss on sale of available-for-sale investment	60	14
Changes in assets and liabilities:
Accounts receivable	10	42
Cost, estimated earnings and billings, net of uncompleted contracts	451	(451)
Accounts payable	22	(161)
Other assets and liabilities	525	(253)
Income tax payable	2	(190)
Net cash used in operating activities	(8,821)	(13,324)
Cash flows from investing activities:
Sale of available-for-sale investments	3,744	4,315
Maturities of held-to-maturity securities	4,636	5,927
Purchases of property and equipment	(499)	(809)
Net cash provided by investing activities-continuing operations	7,881	9,433
Net cash provided by investing activities-discontinued operations	0	6,100
Net cash provided by investing activities	7,881	15,533
Cash flows from financing activities:
Payments for share repurchase	(1,293)	(156)
Proceeds from exercise of stock options	18	16
Net cash used in financing activities	(1,275)	(140)
Net change in cash and cash equivalents	(2,215)	2,069
Cash and cash equivalents at beginning of period	4,399	2,330
Cash and cash equivalents at end of period	2,184	4,399
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Income taxes paid	$ 0	$ 198