Represents the number of warrants issued.

No definition available.

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- Definition

The number of shares of Common stock warrants

+ References

No definition available.

+ Details

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- Definition

Number of dilutive potential common shares

+ References

No definition available.

+ Details

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- Definition

Represents the number of warrants unexercised by the warrant holders.

+ References

No definition available.

+ Details

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- Definition

The number of shares of Preferred stock

+ References

No definition available.

+ Details

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- Definition

The number of shares of Restricted stock outstanding

+ References

No definition available.

+ Details

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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

No definition available.

+ Details

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- Details

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- Definition

Represents class of warrants weighted average exercise price.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

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- Definition

The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

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-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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Period Type:	duration

- Details

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Earnings Per Share (Details 2) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended		0 Months Ended	1 Months Ended
Earnings Per Share (Details 2) (USD $)	Mar. 31, 2015	May 31, 2011	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2014	Feb. 28, 2013	Jan. 31, 2014	May 31, 2014
Dilutive potential common shares
Stock options outstanding	8,191,928plug_StockOptionsOutstanding		8,191,928plug_StockOptionsOutstanding	4,785,485plug_StockOptionsOutstanding	4,785,485plug_StockOptionsOutstanding
Restricted stock outstanding	395,558plug_RestrictedStockOutstanding		395,558plug_RestrictedStockOutstanding	650,002plug_RestrictedStockOutstanding	650,002plug_RestrictedStockOutstanding
Common stock warrants (1)	4,219,442plug_CommonStockWarrants1		4,219,442plug_CommonStockWarrants1	4,250,490plug_CommonStockWarrants1	4,250,490plug_CommonStockWarrants1
Preferred stock (2)	5,554,594plug_PreferredStock2		5,554,594plug_PreferredStock2	11,065,897plug_PreferredStock2	11,065,897plug_PreferredStock2
Number of dilutive potential common shares	18,361,522		18,361,522	20,751,874	20,751,874
Earnings Per Share
Weighted average exercise price	$ 3.84plug_WeightedAverageExercisePrice
Preferred stock (2)	5,554,594plug_PreferredStock2		5,554,594plug_PreferredStock2	11,065,897plug_PreferredStock2	11,065,897plug_PreferredStock2
Warrants issued in May, 2011
Earnings Per Share
Number of warrants issued (in shares)		7,128,563
Antidilutive shares excluded from calculation of diluted earnings per share		22,995,365
Number of warrants unexercised (in shares)			219,342	250,390
Warrants issued in February, 2013
Earnings Per Share
Number of warrants issued (in shares)						23,637,500
Number of warrants unexercised (in shares)	100				100
Warrants issued in January, 2014
Earnings Per Share
Number of warrants issued (in shares)							4,000,000
Series C redeemable convertible preferred stock
Dilutive potential common shares
Preferred stock (2)								10,431
Earnings Per Share
Preferred stock (2)								10,431
Number of preferred shares that had been converted to common stock	5,200