4. Inventories (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
4. Inventories (Details) [Line Items]
Inventory, Work in Process, Gross	$ 1,636,325	$ 1,725,395
Inventory for Government Contracts [Member]
4. Inventories (Details) [Line Items]
Inventory, Work in Process, Gross	$ 1,236,593	$ 1,231,751

Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a)(3))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_InventoryWorkInProcess
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant