CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 2,218	$ 3,077	$ 1,959
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,722	8,648	8,164
Loss on sale or disposal of Property, equipment and leasehold improvements	343	213	195
Deferred income taxes	876	709	374
Stock-based compensation	1,157	784	549
Excess tax benefit from employee stock plans	(44)	(298)	(150)
Other	(283)	(286)	286
Changes in operating assets and liabilities:
Accounts receivable, net	(7,185)	(371)	(858)
Inventories	1,295	(2,185)	(5,577)
Other current assets	1,973	(1,011)	407
Accounts payable and other accrued expenses	3,151	(825)	2,630
Accrued salaries, wages and payroll taxes	354	498	(651)
Refundable deposits	(2,015)	958	1,129
Net cash provided by operating activities	11,562	9,911	8,457
Cash flows from investing activities:
Expenditures for Property, equipment and leasehold improvements	(15,653)	(15,783)	(9,894)
Proceeds from sale of property, equipment and leasehold improvements	412	254	0
Expenditures for long-term deposits	(933)	0	0
Net cash used in investing activities	(16,174)	(15,529)	(9,894)
Cash flows from financing activities:
Principal payments on debt and capital lease obligations	(1,094)	(604)	(1,208)
Proceeds from capital lease financing	0	841	0
Net borrowings under revolving line of credit	5,737	3,000	0
Proceeds from issuances of common stock	93	488	244
Debt issuance costs	(87)	0	(46)
Tax payments related to performance shares issued	(151)	(150)	0
Excess tax benefit from employee stock plans	44	298	160
Net cash provided by (used in) financing activities	4,542	3,873	(850)
Decrease in Cash and cash equivalents	(70)	(1,745)	(2,287)
Cash and cash equivalents:
Beginning of period	981	2,726	5,013
End of period	911	981	2,726
Supplemental disclosure of cash flow information:
Cash paid for interest	629	540	601
Cash paid for income taxes, net	398	1,187	543
Supplemental disclosure of non-cash information:
Purchases of Property, equipment and leasehold improvements included in Accounts payable at end of period	$ 1,334	$ 636	$ 331