LONG TERM DEBT AND NOTES PAYABLE TO BANK (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 7,582	$ 7,745
Debt issuance costs	(157)	(175)
Total debt and debt issuance costs	7,425	7,570
Less current portion of long-term debt and debt issuance costs	4,547	3,941
Total long-term debt and debt issuance costs	2,878	3,629
Revolving credit facility with Bank of America [Member]
Debt Instrument [Line Items]
Total debt	4,213	3,646
Equipment note [Member]
Debt Instrument [Line Items]
Total debt	133	63
Bank of America term loan [Member]
Debt Instrument [Line Items]
Total debt	2,232	2,500
K and R, LLC [Member]
Debt Instrument [Line Items]
Total debt	120	652
Grade Lane 7100, LLC [Member]
Debt Instrument [Line Items]
Total debt	$ 884	$ 884