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Intangible Assets (Details 2) (USD $)
|
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Mar. 31, 2012
|
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|
Minimum
|
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| Intangible Assets | |||
| Estimated useful lives of acquired intangible assets (in years) | 1 year | ||
|
Maximum
|
|||
| Intangible Assets | |||
| Estimated useful lives of acquired intangible assets (in years) | 10 years | ||
|
Solar
|
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| Intangible Assets | |||
| Royalties earned | $ 16,000 | $ 18,600 | |
| Unpaid earned royalties | $ 16,000 | $ 17,500 | |
| Years subject to payment of per-unit royalty fees | 17 years | ||
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CPS
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| Intangible Assets | |||
| Capacity of microturbine product line (in kW) | 100 | ||