Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (13,251)	$ (11,756)
Adjustments to reconcile net loss from operations to net cash used in operating activities:
Stock-based compensation	450	1,134
Amortization	16	20
Depreciation	749	711
Net loss on sale of available-for-sale investment	124	60
Net loss on impairment on long-lived assets	1,693	0
Changes in assets and liabilities:
Accounts receivable	134	10
Cost, estimated earnings and billings, net of uncompleted contracts	0	451
Accounts payable	(147)	22
Other assets and liabilities	(552)	525
Income tax payable	0	2
Net cash used in operating activities	(10,784)	(8,821)
Cash flows from investing activities:
Sale of available-for-sale investments	7,229	3,744
Maturities of securities	1,949	4,636
Purchases of property and equipment	(19)	(499)
Net cash provided by investing activities	9,159	7,881
Cash flows from financing activities:
Payments for share repurchase	(7)	(1,293)
Proceeds from exercise of stock options	0	18
Net cash used in financing activities	(7)	(1,275)
Net change in cash and cash equivalents	(1,632)	(2,215)
Cash and cash equivalents at beginning of period	2,184	4,399
Cash and cash equivalents at end of period	552	2,184
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Income taxes paid	$ 0	$ 0