Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Aug. 11, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term obligations		$ 4,590	$ 4,295	$ 4,590	$ 4,295	$ 4,631
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost related to stock options and RSUs recognized		$ 307	$ 410	$ 749	$ 867
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted during the period (in shares)				151,350	134,100
Weighted average fair value of stock options granted (in dollars per share)				$ 6.25	$ 7.35
Stock options outstanding (in shares)		566,825		566,825
Total unrecognized compensation cost related to non-vested stock option awards		$ 1,727		$ 1,727
Equity incentive plan, weighted average recognition period (in years)				2 years 10 months 25 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted during the period (in shares)				66,602	44,100
Weighted average fair value of restricted stock granted (in dollars per share)				$ 21.47	$ 18.46
RSUs outstanding (in shares)		179,687		179,687
Equity incentive plan, weighted average recognition period (in years)				2 years 2 months 15 days
Total unrecognized compensation cost related to non-vested RSUs		$ 2,013		$ 2,013
Restricted Stock Units (RSUs) [Member] | Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted during the period (in shares)	10,000
Accrued payroll and other compensation		144		144
Long-term obligations		$ 17		17
Dividend equivalent units paid				$ 4	$ 2
2013 Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of grant (in years)				10 years
Shares available for grant (in shares)		640,338		640,338
2013 Equity Compensation Plan [Member] | Service-Based Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate percentage				25.00%
Award service period (in years)				1 year
Third Anniversary [Member] | 2013 Equity Compensation Plan [Member] | Service-Based RSUs [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate percentage				50.00%
Fourth Anniversary [Member] | 2013 Equity Compensation Plan [Member] | Service-Based RSUs [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate percentage				50.00%