Shareholders' Equity (Details 2) (USD $)	12 Months Ended
Mar. 31, 2013
STOCK OPTIONS EXERCISABLE
Common stock available for grant under the Plan (in shares)	188,000
Stock options
STOCK OPTIONS OUTSTANDING
Number Outstanding (in shares)	547,000
Weighted-Average Remaining Contractual Life	2 years 9 months 18 days
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.22
STOCK OPTIONS EXERCISABLE
Number Exercisable (in shares)	222,614
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.34
Nonqualified stock options
STOCK OPTIONS OUTSTANDING
Number Outstanding (in shares)	407,000
Incentive stock options
STOCK OPTIONS OUTSTANDING
Number Outstanding (in shares)	140,000
$0.60 - $1.09 \| Stock options
Employee stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 0.60
Exercise price, high end of range (in dollars per share)	$ 1.09
STOCK OPTIONS OUTSTANDING
Number Outstanding (in shares)	292,000
Weighted-Average Remaining Contractual Life	3 years 6 months
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.01
STOCK OPTIONS EXERCISABLE
Number Exercisable (in shares)	70,602
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.02
$1.15 - $1.34 \| Stock options
Employee stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 1.15
Exercise price, high end of range (in dollars per share)	$ 1.34
STOCK OPTIONS OUTSTANDING
Number Outstanding (in shares)	130,000
Weighted-Average Remaining Contractual Life	1 year 10 months 24 days
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.22
STOCK OPTIONS EXERCISABLE
Number Exercisable (in shares)	76,090
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.20
$1.45 - $2.15 \| Stock options
Employee stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 1.45
Exercise price, high end of range (in dollars per share)	$ 2.15
STOCK OPTIONS OUTSTANDING
Number Outstanding (in shares)	125,000
Weighted-Average Remaining Contractual Life	2 years 1 month 6 days
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.71
STOCK OPTIONS EXERCISABLE
Number Exercisable (in shares)	75,922
Weighted-Average Exercise Price per Share (in dollars per share)	$ 1.79

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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