Loss per Share - Amounts Used in Computing (Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Numerator:
Net loss	$ (210)	$ (1,934)	$ (3,248)	$ (2,958)	$ (5,287)	$ (1,737)	$ (2,400)	$ (2,297)	$ (8,350)	$ (11,721)	$ (3,765)
Denominator:
Weighted average shares outstanding - basic and diluted (in shares)									22,801,000	22,615,000	22,483,000
Loss per share - basic and diluted:
Net loss per share (in dollars per share)	$ (0.01)	$ (0.08)	$ (0.14)	$ (0.13)	$ (0.23)	$ (0.08)	$ (0.11)	$ (0.10)	$ (0.37)	$ (0.52)	$ (0.17)
Anti-dilutive stock options, SSARs, restricted shares and performance shares									756,000	1,004,000	1,682,000
Outstanding weighted average basic shares, number of excluded restricted shares and performance shares									334,817	490,355	343,585