LONG TERM DEBT AND NOTES PAYABLE TO BANK (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 7,745	$ 6,618
Debt issuance costs	(175)	(141)
Total debt and debt issuance costs	7,570	6,477
Less current portion of long-term debt and debt issuance costs	3,941	4,941
Total long-term debt and debt issuance costs	3,629	1,536
Grade Lane 7100, LLC [Member]
Debt Instrument [Line Items]
Total debt	884	884
K and R, LLC [Member]
Debt Instrument [Line Items]
Total debt	652	716
Equipment note [Member]
Debt Instrument [Line Items]
Total debt	63	0
Revolving credit facility with Bank of America and MidCap [Member]
Debt Instrument [Line Items]
Total debt	3,646	5,018
Bank of America term loan [Member]
Debt Instrument [Line Items]
Total debt	$ 2,500	$ 0