Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (12,070)	$ (1,724)
Adjustments to reconcile net loss to net cash from operating activities
Depreciation of property and equipment	2,244	2,382
Amortization of intangible assets	908	235
Write-off of patent costs	917	500
Provision for doubtful accounts	600	125
Stock-based compensation	10,469	8,600
Accretion (Amortization) of Discounts and Premiums, Investments	145
Changes in assets and liabilities
Accounts receivable	4,551	(3,870)
Inventories	(6,011)	(2,699)
Prepaid expenses and other assets	1,310	647
Accounts payable	1,995	1,915
Accrued expenses and other liabilities	(4,902)	144
Deferred revenue	(1,290)	(1,347)
Net cash (used in) provided by operating activities	(1,424)	4,908
Cash flows from investing activities
Purchases of property and equipment	(2,138)	(2,286)
Payments To Acquire Intangible Assets Purchased	(5,741)
Purchase of investments	(750)	(3,055)
Payments to Acquire Debt Securities, Available-for-sale	(17,968)
Sales of marketable securities	4,890	97
Maturities of marketable securities	23,800
Costs incurred in connection with patents	(717)	(665)
Net cash provided by (used in) investing activities	1,376	(5,909)
Cash flows from financing activities
Proceeds from employee stock purchase plan	1,687	1,551
Payments of employee taxes related to vested restricted stock	(6,246)	(1,708)
Exercise of stock options		196
Proceeds from (Payments for) Other Financing Activities	(58)	(18)
Net cash (used in) provided by financing activities	(4,617)	21
Net change in cash and cash equivalents	(4,665)	(980)
Cash and cash equivalents
Beginning of period	74,237	116,260
End of period	$ 69,572	$ 115,280