CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities
Net income	$ 3,544,000	$ 2,080,000
Non-cash charges:
Depreciation and amortization	1,720,000	1,551,000
Amortization of other intangible assets	1,295,000	718,000
Amortization of debt issue costs	111,000	94,000
Provision for/(recovery of) doubtful accounts	18,000	(90,000)
Stock-based compensation	86,000	220,000
Restricted stock-based compensation	43,000	27,000
(Gain) loss on sale of fixed assets	(2,000)	14,000
Deferred income taxes	382,000	1,458,000
Fair value reduction in contingent consideration	(126,000)	0
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(215,000)	1,233,000
Inventories	223,000	1,670,000
Prepaid expenses and other current assets	401,000	250,000
Other assets	101,000	79,000
Accounts payable	408,000	(318,000)
Accrued compensation and benefits	(595,000)	492,000
Accrued other liabilities	(804,000)	(746,000)
Other liabilities	(17,000)	(16,000)
Total adjustments	3,029,000	6,636,000
Net cash provided by operating activities	6,573,000	8,716,000
Cash Flows from Investing Activities:
Capital expenditures	(1,422,000)	(1,072,000)
Proceeds from disposal of assets	48,000	15,000
Purchase of net assets Air Tool Service Company	0	(7,659,000)
Purchase of Exhaust Technologies, Inc.	0	(10,377,000)
Purchase of Universal Air Tool Company Limited, net of cash acquired of $14,000	0	(1,792,000)
Net cash used in investing activities	(1,374,000)	(20,885,000)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	73,000	745,000
Purchase of Class A common stock	0	(1,583,000)
Proceeds from short-term borrowings	72,347,000	84,167,000
Repayments of short-term borrowings	(74,541,000)	(72,710,000)
Proceeds from term loan	0	3,000,000
Repayments of term loans	(3,127,000)	(793,000)
Proceeds from notes payable	0	66,000
Repayments of notes payable	(39,000)	(21,000)
Bank financing costs	0	(44,000)
Excess tax benefit on stock-based compensation	18,000	0
Net cash (used in) provided by financing activities	(5,269,000)	12,827,000
Effect of exchange rate changes on cash	(14,000)	(60,000)
Net (decrease) increase in cash	(84,000)	598,000
Cash at beginning of year	1,011,000	413,000
Cash at end of year	927,000	1,011,000
Supplemental disclosures of cash flow information:
Cash paid for: Interest	615,000	415,000
Cash paid for: Income taxes	1,626,000	143,000
Supplemental disclosures of non-cash investing and financing activities:
Exchange of fixed assets	64,000	0
Contingent Consideration on Acquisition	$ 0	$ 425,000