Income Taxes (Details 3)	Dec. 31, 2012 USD ($)	Mar. 31, 2012 USD ($)	Mar. 31, 2012 EUR (€)	Dec. 31, 2011 USD ($)	Jan. 31, 2011 USD ($)	Jan. 31, 2011 EUR (€)
Deferred tax assets:
Allowance for doubtful accounts	$ 34,580			$ 40,155
Inventory items	371,089			159,547
Reserves and accruals	502,141			542,095
Compensation expense-stock options	177,717			128,045
Foreign tax credit carryover	329,314			279,366
Intangibles	29,734			33,371
Other	319,137			205,769
Subtotal	1,763,712			1,388,348
Less: Valuation allowance	(76,504)			(50,504)
Total deferred tax assets	1,687,208			1,337,844
Deferred tax liabilities:
Fixed assets	(506,478)			(468,887)
Intangibles	(2,808,675)
Total deferred tax liabilities	(3,315,153)			(468,887)
Net deferred tax asset	(1,627,945)			868,957
Repatriated amount by German subsidiary in the form of dividend (distributions)		3,300,000	2,500,000		3,300,000	2,500,000
Accumulated undistributed earnings remaining at the subsidiary	2,200,000
Deferred tax liability on remaining foreign earnings	$ 0