REVENUE - Impact of New Revenue Guidance on Financial Statement Line Items (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017	[1]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Net Sales	$ 29,558	$ 28,310	$ 84,543	$ 86,762
Cost of Goods Sold	26,171	24,794	74,311	76,789
Gross Profit	3,387	3,516	10,232	9,973
Income from Operations	649	284	1,263	500
Income Before Income Taxes	479	112	712	(128)
Income Tax Expense	115	69	350	(141)
Net Income	$ 364	$ 43	$ 362	$ 13
Net Income Per Common Share - Diluted	$ 0.14	$ 0.02	$ 0.13	$ 0.00
Assets
Inventories	$ 15,236		$ 15,236			$ 18,527
Contract Assets	7,076		7,076
Shareholders' Equity
Retained Earnings	5,632		5,632			$ 3,889
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net Income			362	$ 13
Change in Current Operating Items
Inventories			(1,959)	(686)
Contract Assets			(617)
Net Cash Provided by Operating Activities			2,564	$ 615
ASU 2014-09
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Net Sales	29,558		84,543
Cost of Goods Sold	26,171		74,311
Gross Profit	3,387		10,232
Income from Operations	649		1,263
Income Before Income Taxes	479		712
Income Tax Expense	115		350
Net Income	$ 364		$ 362
Net Income Per Common Share - Diluted	$ 0.14		$ 0.13
Assets
Inventories	$ 15,236		$ 15,236
Contract Assets	7,076		7,076		$ 6,459
Shareholders' Equity
Retained Earnings	5,632		5,632		$ 1,381
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net Income			362
Change in Current Operating Items
Inventories			(1,959)
Contract Assets			(617)
Net Cash Provided by Operating Activities			2,564
Pro-forma as of the previous accounting guidance was in effect
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Net Sales	27,665		80,323
Cost of Goods Sold	24,454		70,291
Gross Profit	3,211		10,032
Income from Operations	472		1,063
Income Before Income Taxes	303		512
Income Tax Expense	115		350
Net Income	$ 188		$ 162
Net Income Per Common Share - Diluted	$ 0.07		$ 0.06
Assets
Inventories	$ 20,732		$ 20,732
Shareholders' Equity
Retained Earnings	$ 4,051		4,051
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net Income			162
Change in Current Operating Items
Inventories			(2,376)
Net Cash Provided by Operating Activities			$ 2,564

[1] The balance sheet at December 31, 2017 has been derived from the audited financial statements at that date