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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic earnings (loss) per Common Share:
Weighted-average common shares outstanding for basic earnings (loss) per share calculation	9,644,000	9,499,000	9,608,000	9,496,000
Diluted earnings (loss) per Common Share:
Weighted-average common shares outstanding	9,644,000	9,499,000	9,608,000	9,496,000
Stock options		41,000	97,000	53,000
Weighted-average common shares outstanding for diluted earnings (loss) per share calculation	9,644,000	9,540,000	9,705,000	9,549,000