Earnings (Loss) Per Share - Components of Denominator for Basic Earnings (Loss) Per Common Share and Diluted Earnings (Loss) Per Common Share (Detail)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Basic earnings (loss) per Common Share:
Weighted-average common shares outstanding for basic earnings (loss) per share calculation	9,766,000	9,644,000	9,741,000	9,608,000
Diluted earnings (loss) per Common Share:
Weighted-average basic shares outstanding	9,766,000	9,644,000	9,741,000	9,608,000
Stock options	196,000		196,000	97,000
Weighted-average common shares outstanding for diluted earnings (loss) per share calculation	9,962,000	9,644,000	9,937,000	9,705,000