Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net loss	$ (2,390)	$ (815)
Adjustments to reconcile net loss to net cash used in operations
Depreciation of property and equipment	1,988	1,940
Amortization and write-off of patents	128	831
Provision for (recovery of) doubtful accounts	(93)	190
Stock-based compensation	5,740	5,933
Changes in assets and liabilities
Accounts receivable	561	(2,460)
Inventories	(504)	1,271
Prepaid expenses and other assets	2,792	1,936
Accounts payable	(608)	(1,028)
Accrued expenses and other liabilities	(8,439)	(3,976)
Deferred revenue	0	10,000
Net cash (used in) provided by operating activities	(825)	13,822
Cash flows from investing activities
Purchases of property and equipment	(1,269)	(481)
Proceeds from Collection of Notes Receivable	143	0
Sales of marketable securities	96	0
Costs incurred in connection with patents	(622)	(375)
Net cash used in investing activities	(1,652)	(856)
Cash flows from financing activities
Proceeds from Stock Plans	1,385	1,400
Exercise of stock options	513	4,275
Proceeds from (Payments for) Other Financing Activities	12	0
Net cash provided by financing activities	1,910	5,675
Net change in cash and cash equivalents	(567)	18,641
Cash and cash equivalents
Beginning of period	107,912	60,638
End of period	$ 107,345	$ 79,279