CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED STATEMENTS OF INCOME
Revenue									$ 55,272	$ 47,857
Costs of goods sold, inclusive of depreciation and amortization									43,146	35,772
Gross margin									12,126	12,085
Operating Expenses:
Selling, general and administrative									9,313	7,743
Interest expense									125	107
Total operating expenses									9,438	7,850
Income before income tax provision									2,688	4,235
Income tax provision									579	737
Net income	$ 165	$ 1,132	$ 714	$ 98	$ 1,003	$ 1,457	$ 707	$ 331	$ 2,109	$ 3,498
Basic
Net Income per share (in dollars per share)									$ 0.91	$ 1.54
Diluted
Net income per share (in dollars per share)									$ 0.88	$ 1.49