CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Balances at Mar. 31, 2010	$ 9,120	$ 105	$ 27,545	$ (18,530)
Balances (in shares) at Mar. 31, 2010		5,252,572
Increase (Decrease) in Stockholders' Equity
Issuances of common stock for Director Stock Grants	27		27
Issuances of common stock for Director Stock Grants (in shares)		10,000
Issuance of common stock for exercise of stock options for cash	187	3	184
Issuance of common stock for exercise of stock options for cash (in shares)		132,596
Compensation expense related to stock options	47		47
Net income	1,730			1,730
Balances at Mar. 31, 2011	11,111	108	27,803	(16,800)
Balances (in shares) at Mar. 31, 2011		5,395,168
Increase (Decrease) in Stockholders' Equity
Issuances of common stock for Director Stock Grants	30		30
Issuances of common stock for Director Stock Grants (in shares)		8,000
Issuance of common stock for exercise of stock options for cash	69	1	68
Issuance of common stock for exercise of stock options for cash (in shares)		37,800
Compensation expense related to stock options	423		423
Net income	3,632			3,632
Balances at Mar. 31, 2012	15,265	109	28,324	(13,168)
Balances (in shares) at Mar. 31, 2012		5,440,968
Increase (Decrease) in Stockholders' Equity
Issuances of common stock for Director Stock Grants	74		74
Issuances of common stock for Director Stock Grants (in shares)		13,000
Issuance of common stock for exercise of stock options for cash	23		23
Issuance of common stock for exercise of stock options for cash (in shares)		9,970
Compensation expense related to stock options	656		656
Net income	4,209			4,209
Balances at Mar. 31, 2013	$ 20,227	$ 109	$ 29,077	$ (8,959)
Balances (in shares) at Mar. 31, 2013		5,463,938