Employee Benefit Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified			12 Months Ended				1 Months Ended			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Stock options	Mar. 31, 2014 Stock options Change in Control	Mar. 31, 2014 Restricted stock units	Mar. 31, 2014 Restricted stock units Change in Control	Sep. 30, 2012 2007 Plan	Sep. 30, 2009 2007 Plan	Mar. 31, 2014 2007 Plan	Mar. 31, 2014 2007 Plan Stock options	Mar. 31, 2014 2007 Plan Stock options Maximum	Mar. 31, 2014 2007 Plan Restricted stock units	Mar. 31, 2014 1997 Plan	Mar. 31, 2014 1997 Plan Stock options
Employee Benefit Plans
Expiration term											10 years
Vesting percentage										25.00%		25.00%
Vesting period										4 years		4 years
Increase in number of shares of common stock authorized and reserved for issuance under the plan							800,000	800,000
Total shares authorized under the plan							2,450,000	1,650,000
Shares of common stock available for grant	263,000								263,000
Options or other stock-based awards granted (in shares)													0
Number of Options
Options outstanding at the beginning of the period (in shares)	2,019,000	1,744,000	1,744,000											262,000
Granted (in shares)			710,000
Exercised (in shares)			(284,000)
Forfeited (in shares)			(54,000)
Expired (in shares)			(98,000)
Options outstanding at the end of the period (in shares)	2,019,000	1,744,000	2,018,000							1,757,000				262,000
Options exercisable at the end of the period (in shares)			1,125,000
Vested and expected to vest at the end of the period (in shares)			1,875,000
Options exercisable at the end of the period pursuant to a change-in-control (in shares)			2,018,000
Weighted Average Exercise Price Per Share
Options outstanding at the beginning of the period (in dollars per share)			$ 1.74
Granted (in dollars per share)			$ 1.85
Exercised (in dollars per share)			$ 0.88
Forfeited (in dollars per share)			$ 1.50
Expired (in dollars per share)			$ 2.43
Options outstanding at the end of the period (in dollars per share)			$ 1.88
Options exercisable at the end of the period (in dollars per share)			$ 1.98	$ 1.88
Vested and expected to vest at the end of the period (in dollars per share)			$ 1.88
Weighted Average Remaining Contractual Life
Options outstanding at the end of the period			6 years 7 months 6 days
Options exercisable at the end of the period			4 years 7 months 6 days	6 years 7 months 6 days
Vested and expected to vest at the end of the period			6 years 4 months 24 days
Aggregate Intrinsic Value
Options outstanding at the end of the period (in dollars)			$ 548
Options exercisable at the end of the period (in dollars)			316
Vested and expected to vest at the end of the period (in dollars)			518
Options exercisable at the end of the period pursuant to a change-in-control (in dollars)			548
Number of shares of common stock receivable upon vesting of each RSU												1
Number of Shares
RSUs outstanding at the beginning of the period (in shares)	195,000				210,000
Granted (in shares)					90,000
Vested (in shares)					(76,000)
Forfeited (in shares)					(29,000)
RSUs outstanding at the end of the period (in shares)	195,000				195,000							195,000
Expected to vest at the end of the period (in shares)					169,000
Common stock issuable (for RSUs) at the end of the period upon a change-in-control (in shares)						195,000
Weighted Average Price Per Share
RSUs outstanding at the beginning of the period (in dollars per share)					$ 1.39
Granted (in dollars per share)					$ 1.81
Vested (in dollars per share)					$ 1.40	$ 1.58
Forfeited (in dollars per share)					$ 1.09
RSUs outstanding at the end of the period (in dollars per share)					$ 1.58
Expected to vest at the end of the period (in dollars per share)					$ 1.57
Weighted Average Remaining Life
RSUs outstanding at the end of the period					2 years 3 months 18 days	2 years 3 months 18 days
Expected to vest at the end of the period					2 years 2 months 12 days
Aggregate Intrinsic Value
RSUs outstanding at the end of the period (in dollars)					82
Expected to vest at the end of the period (in dollars)					73
Common stock issuable (for RSUs) at the end of the period upon a change-in-control (in dollars)						$ 82