Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Net Loss Per Share

	Year Ended December 31,
	2017			2016			2015
	(in thousands, except per share amounts)
Numerator:
Net loss available to common stockholders	$	(6,661	)	$	(15,343	)	$	(2,602	)
Denominator:
Weighted average shares outstanding - basic		13,489			11,951			11,486
Potential common shares - options (treasury    stock method)		—			—			—
Weighted average shares outstanding - diluted		13,489			11,951			11,486
Shares excluded (anti-dilutive)		—			—			17
Shares excluded due to an exercise price greater than    weighted average stock price for the period		1,839			2,094			383
Net loss per common share:
Basic	$	(0.49	)	$	(1.28	)	$	(0.23	)
Diluted	$	(0.49	)	$	(1.28	)	$	(0.23	)