Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income	$ 5,237	$ 4,966
Adjustments to reconcile net income to net cash flows from operating activities
Depreciation	19	21
Accretion of debt discount and loan costs	86	65
Amortization of intangible assets	1,735	1,781
Provision for inventory obsolescence	369	405
Stock-based compensation expense	1,490	1,520
Changes in assets and liabilities:
Accounts receivable	(144)	(6,324)
Inventories	106	(4,096)
Prepaid expenses and other assets	602	1,169
Accounts payable and accrued liabilities	1,597	6,920
Taxes payable	0	(40)
Net cash flows provided by operating activities	11,097	6,387
Investing activities:
Purchase of equipment	(296)	0
Net cash flows used in investing activities	(296)	0
Financing activities:
Proceeds from exercise of stock options	198	338
Payment on share repurchase	(6,147)	0
Net cash flows (used in) provided by financing activities	(5,949)	338
Net change in cash and cash equivalents	4,852	6,725
Cash and cash equivalents at beginning of period	111,584	63,888
Cash and cash equivalents at end of period	116,436	70,613
Cash paid for interest	$ 1,900	$ 1,442