Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value measurement (Details 2) (Fair value of contingent consideration, USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended
	Feb. 22, 2013 Endeka	Dec. 31, 2013 Endeka	Dec. 31, 2013 Endeka and AWG	Oct. 31, 2013 AWG	Dec. 31, 2013 AWG
Fair value measurement
Discount rate (as a percent)	50.50%	25.00%		3.10%	3.10%
Reconciliation between the beginning and ending balances of preferred stock warrants
Contingent consideration for acquisition of businesses			$ 2,309
Change in fair value			(367)
Balance at the end of the period			$ 1,942