Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net loss	$ (2,076)	$ (5,780)
Adjustments to reconcile net loss to net cash from operating activities
Depreciation of property and equipment	725	740
Amortization of intangible assets	304	234
Write-off of patent costs		505
Provision for doubtful accounts		75
Stock-based compensation	4,907	3,906
Accretion (Amortization) of Discounts and Premiums, Investments	(215)	94
Changes in assets and liabilities
Accounts receivable	(4,761)	1,316
Inventories	(1,446)	(1,431)
Prepaid expenses and other assets	(386)	763
Accounts payable	1,865	2,059
Accrued expenses and other liabilities	(1,126)	(7,490)
Deferred revenue	(383)	(523)
Net cash used in operating activities	(2,162)	(5,720)
Cash flows from investing activities
Purchases of property and equipment	(1,132)	(543)
Payments To Acquire Intangible Assets Purchased		(5,741)
Payments to Acquire Debt Securities, Available-for-sale	(88,728)	(4,844)
Sales of marketable securities	2,400
Maturities of marketable securities	2,450	7,400
Costs incurred in connection with patents		(325)
Payments to Acquire Other Investments	(2,175)
Net cash used in investing activities	(87,185)	(4,053)
Cash flows from financing activities
Payments of employee taxes related to vested restricted stock	(3,410)	(5,506)
Proceeds from (Payments for) Other Financing Activities	(35)	(19)
Net cash used in financing activities	(3,445)	(5,525)
Net change in cash and cash equivalents	(92,792)	(15,298)
Cash and cash equivalents
Beginning of period	185,463	74,237
End of period	$ 92,671	$ 58,939