Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (2,170)	$ 1,228
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	10,367	11,367
Amortization of debt issuance costs	79	144
Provision for doubtful accounts	1,016	154
Provision for excess and obsolete inventory	(3)	123
Loss on disposition of fixed assets	133	62
Loss on early extinguishment of debt	0	144
Deferred income taxes	476	244
Stock-based compensation expense	3,027	4,032
Changes in operating assets and liabilities:
Accounts receivable	(894)	(1,525)
Inventories	2,811	(890)
Prepaid expenses, other receivables and other assets	8,173	1,294
Deferred rent	0	(742)
Operating leases	(7,112)	0
Trade accounts payable, deferred revenue, accrued expenses and other liabilities	(5,044)	(4,070)
Net cash provided by operating activities	10,859	11,565
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(3,912)	(4,936)
Proceeds from sale of property and equipment	159	54
Net cash used in investing activities	(3,753)	(4,882)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock	14	350
Taxes paid on behalf of employees for withheld shares	(304)	(363)
Payments on performance-based contingent payments	0	(849)
Payments on finance lease obligations	(1,644)	(2,505)
Payments on term loan	0	(27,000)
Payments on revolving loan	(148,331)	(126,743)
Borrowings on revolving loan	143,031	149,010
Debt issuance costs	0	(283)
Payments on other debt	(3,274)	(1,556)
Borrowings on other debt	1,105	0
Borrowings on other debt	(9,403)	(9,939)
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS	(681)	(410)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(2,978)	(3,666)
Cash and cash equivalents, beginning of period	15,419	19,078
Restricted cash, beginning of period	207	214
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	15,626	19,292
Cash and cash equivalents, end of period	12,434	15,419
Restricted cash, end of period	214	207
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, end of period	12,648	15,626
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for income taxes	910	2,641
Cash paid for income taxes	1,917	2,237
Cash paid for interest
Property and equipment acquired under long-term debt and finance leases	2,956	2,590
Performance-based contingent payments through stock issuance	$ 0	$ 822