Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 9,369	$ (1,915)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,011	6,459
Non-cash operating lease cost	912	725
Goodwill impairment	0	18,144
Change in fair value of contingent consideration	(18,470)	(20,326)
Loss on disposal of fixed assets	831	265
Loss on impairment of intangible asset	0	1,025
Stock-based compensation expense	5,056	2,033
Deferred income taxes	1,196	(907)
Provision (recovery) for doubtful accounts	(26)	(36)
Provision for inventory	2,404	3,259
Amortization of acquisition related inventory step-up	4,786	4,123
Changes in operating assets and liabilities:
Accounts receivable	(5,347)	6,208
Inventories	(6,796)	(5,410)
Prepaid expenses, other current and long-term assets	1,608	(373)
Accounts payable	(642)	(2,462)
Operating lease liabilities	(849)	(675)
Accrued expenses, other current and long-term liabilities	2,307	(5,135)
Income taxes	(1,487)	(389)
Net cash provided by operating activities	1,863	4,613
Cash flows from investing activities:
Acquisition of Parcus Medical and Arthrosurface, net of cash acquired	(352)	(93,859)
Proceeds from maturities of investments	2,501	20,000
Purchases of investments	0	(20,035)
Purchases of property and equipment	(2,732)	(908)
Net cash used in investing activities	(583)	(94,802)
Cash flows from financing activities:
Payments made on finance leases	(147)	0
Repayments of long term debt	0	(351)
Proceeds from long term debt	0	50,000
Cash paid for tax withheld on vested restricted stock awards	(353)	(200)
Proceeds from exercises of equity awards	643	68
Net cash provided by financing activities	143	49,517
Exchange rate impact on cash and cash equivalents	(59)	(45)
Increase (decrease) in cash and cash equivalents	1,364	(40,717)
Cash and cash equivalents at beginning of period	95,817	157,463
Cash and cash equivalents at end of period	97,181	116,746
Non-cash Investing Activities:
Purchases of property and equipment included in accounts payable and accrued expenses	263	61
Right of use assets	220	0
Consideration for acquisitions included in accounts payable and accrued expenses	0	1,209
Acquisition related contingent consideration	0	69,076
Operating lease liabilities	$ 220	$ 0