Amortizable intangible assets -Amounts related to intangible assets (Details) (USD $)	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,124,737
Finite-Lived Intangible Assets, Accumulated Amortization	154,960
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	469,031
Finite-Lived Intangible Assets, Accumulated Amortization	45,648
Product Certification [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	415,706
Finite-Lived Intangible Assets, Accumulated Amortization	93,312
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	240,000
Finite-Lived Intangible Assets, Accumulated Amortization	$ 16,000