7. Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Beginning Balance, Amount			$ 32,007
Share-based compensation expense			66
Restricted stock unit compensation expense			111	$ 41
Dividends declared			(810)
Net income	$ 650	$ 600	1,153	650
Repurchase of common stock			(1,153)	$ (405)
Ending Balance, Amount	31,374		31,374
Common Stock
Beginning Balance, Amount			$ 8,307
Beginning Balance, Shares			13,844,584
Restricted stock units issued, Amount			$ 23
Restricted stock units issued, Shares			38,353
Ending Balance, Amount	$ 8,330		$ 8,330
Ending Balance, Shares	13,882,937		13,882,937
Additional Paid In Capital
Beginning Balance, Amount			$ 25,642
Restricted stock units issued, Amount			(23)
Share-based compensation expense			66
Restricted stock unit compensation expense			111
Ending Balance, Amount	$ 25,796		25,796
Accumulated Deficit
Beginning Balance, Amount			(5,450)
Dividends declared			(810)
Net income			1,153
Effect of adoption of ASU 2016-01			4,318
Ending Balance, Amount	(789)		(789)
Accumulated Other Comprehensive Income
Beginning Balance, Amount			4,318
Effect of adoption of ASU 2016-01			(4,318)
Ending Balance, Amount	0		0
Treasury Stock
Beginning Balance, Amount			(810)
Repurchase of common stock			(1,153)
Ending Balance, Amount	$ (1,963)		$ (1,963)