Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income (loss)	$ 84,860	$ 25,711	$ (15,305)
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities
Depreciation	140	538	1,846
Accretion of debt discount and loan costs	342	320	11,508
Amortization of intangible assets	7,284	6,981	6,981
Provision for inventory obsolescence	1,926	1,870	197
Deferred income taxes	(56,527)	0	0
Net change in operating lease assets and liabilities	(376)	0	0
Stock-based compensation expense	6,168	9,595	5,416
Changes in assets and liabilities, net of effect of acquisition:
Accounts receivable	(8,717)	(9,360)	(25,163)
Inventories	(8,195)	(8,001)	(6,102)
Prepaid expenses and other assets	(1,970)	(1,439)	(581)
Accounts payable and accrued expenses	16,102	(1,234)	32,275
Net cash flows provided by operating activities	41,037	24,981	11,072
Investing activities:
Product acquisitions	(6,457)	0	(30,685)
Acquisitions of equipment	(415)	(13)	(79)
Net cash flows used in investing activities	(6,872)	(13)	(30,764)
Financing activities:
Proceeds from exercise of stock options	463	3,369	2,321
Proceeds from issuance of common stock, less underwriters discount	0	0	48,000
Payment on note payable	(20,000)	0	(67,346)
Proceeds from notes payable	0	20,000	59,987
Equity finance costs	0	0	(410)
Payment of deferred financing fees	0	(436)	0
Loss on refinancing of former debt	0	0	(2,794)
Payment on share repurchase	(11,903)	(205)	0
Net cash flows (used in) provided by financing activities	(31,440)	22,728	39,758
Net change in cash and cash equivalents	2,725	47,696	20,066
Cash and cash equivalents at beginning of year	111,584	63,888	43,822
Cash and cash equivalents at end of year	114,309	111,584	63,888
Cash paid for interest	7,191	6,979	6,809
Cash paid for income taxes	$ 1,415	$ 250	$ 0