Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 62,766	$ 66,068	$ 68,526
Operating expenses
Cost of services	30,075	30,592	31,395
Selling, general and administrative expenses	10,204	10,451	10,147
Depreciation and amortization	7,643	7,232	7,377
Total operating expenses	47,922	48,275	48,919
Income from operations	14,844	17,793	19,607
Other income (expense)
Interest expense	(5,271)	(5,844)	(13,249)
Loss on debt prepayment penalty			(2,303)
Other income	616	263	204
Total other expense	(4,655)	(5,581)	(15,348)
Income before income tax (expense) benefit	10,189	12,212	4,259
Income tax (expense) benefit	(2,393)	(2,745)	7,856
Net income	$ 7,796	$ 9,467	$ 12,115
Weighted average number of common shares outstanding:
Basic (in shares)	3,412,805	3,388,624	3,346,689
Diluted (in shares)	3,430,453	3,434,862	3,445,632
Basic net income per common share (in dollars per share)	$ 2.28	$ 2.79	$ 3.62
Diluted net income per common share (in dollars per share)	$ 2.27	$ 2.76	$ 3.52