CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net loss	$ (13,445)	$ (865)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	218	456
Remeasurement of acquisition-related contingent consideration	0	2,478
Remeasurement of financing-related contingent consideration	0	310
Amortization of debt discount and debt issuance costs	312	1,573
Change in deferred tax and income tax deferred charge	(2,534)	(8,440)
Stock-based compensation expense	1,728	742
Gain from the release of certain liabilities	(78)	0
Other adjustments	561	573
Net changes in assets and liabilities
Accounts receivable	0	(517)
Inventories	0	47
Prepaid expenses and other current assets	(3,736)	899
Research and development tax credit receivable	80	160
Accounts payable & other current liabilities	(3,789)	(1,187)
Accrued expenses	(2,112)	(4,905)
Accrued income taxes	0	2,253
Earn-out payments for contingent consideration in excess of acquisition-date fair value	0	(1,774)
Royalty payments for contingent consideration payable in excess of original fair value	0	(291)
Other assets and liabilities	(618)	(3,148)
Net cash used in operating activities	(23,413)	(11,636)
Cash flows from investing activities:
Purchases of property and equipment	(26)	0
Proceeds from the disposition of the hospital products	8,250	0
Proceeds from sales of marketable securities	40,736	14,788
Purchases of marketable securities	(37,769)	(1,562)
Net cash provided by investing activities	11,191	13,226
Cash flows from financing activities:
Proceeds from the February 2020 private placement	0	60,733
Proceeds from stock option exercises and employee stock purchase plan	149	1,477
Net cash provided by financing activities	149	62,210
Effect of foreign currency exchange rate changes on cash and cash equivalents	(477)	(68)
Net change in cash and cash equivalents	(12,550)	63,732
Cash and cash equivalents at January 1,	71,722	9,774	$ 9,774
Cash and cash equivalents at March 31,	59,172	73,506	$ 71,722
Supplemental disclosures of cash flow information:
Interest paid	3,234	3,234
Income taxes paid	$ 0	$ 0