Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Retained Earnings [Member]
Beginning balance at Dec. 31, 2015	$ 54,551	$ 72	$ 6,964	$ (31)	$ 47,546
Beginning balance, shares at Dec. 31, 2015		7,203
Common stock issued on exercise of options and vesting of restricted stock units	72		72
Common stock issued on exercise of options and vesting of restricted stock units, shares		8
Common stock repurchased on vesting of restricted stock units	(40)		(40)
Common stock repurchased on vesting of restricted stock units, shares		(1)
Share based compensation expense	359		359
Excess tax benefits from share-based compensation	265		265
Cash dividends on common stock	(1,586)				(1,586)
Unrealized gain (loss) on investments, net of tax	34			34
Net loss	(8,003)				(8,003)
Ending balance at Mar. 31, 2016	45,652	$ 72	7,620	3	37,957
Ending balance, shares at Mar. 31, 2016		7,210
Beginning balance at Dec. 31, 2016	69,693	$ 72	9,638	(3)	59,986
Beginning balance, shares at Dec. 31, 2016		7,244
Common stock issued on exercise of options and vesting of restricted stock units	98	$ 1	97
Common stock issued on exercise of options and vesting of restricted stock units, shares		9
Common stock repurchased on vesting of restricted stock units	(68)		(68)
Common stock repurchased on vesting of restricted stock units, shares		(1)
Share based compensation expense	882		882
Cash dividends on common stock	(1,813)				(1,813)
Unrealized gain (loss) on investments, net of tax	(20)			(20)
Net loss	(11,227)				(11,227)
Ending balance at Mar. 31, 2017	$ 57,545	$ 73	$ 10,549	$ (23)	$ 46,946
Ending balance, shares at Mar. 31, 2017		7,252