Basis of presentation and significant accounting policies (Tables)

9 Months Ended

Sep. 30, 2013

Effect of Reclassification on Balance Sheet

As further described in Note 9, the Company may be required to pay a $5.0 million penalty if it does not achieve certain performance obligations agreed to in connection with the sale of its common stock in a private placement transaction on April 27, 2012.  The penalty payment was originally classified outside of equity as redeemable common stock at December 31, 2012 since, while the Company intends to meet its performance obligations, it determined the ability to satisfy some of the obligations may be outside of the Company’s control.  The Company has since determined that the $5.0 million penalty payment is an embedded derivative instrument, with the underlying being the performance or nonperformance of meeting its performance obligations by the deadline, and has thus classified $4.9 million of the $5.0 million to additional paid-in capital and the remaining $0.1 million, representing the estimated fair value of the penalty payment derivative, to other noncurrent liabilities at December 31, 2012.   The effect on the Company’s balance sheet at December 31, 2012 for this matter was as follows:

	December 31, 2012
(in thousands)	Previously Reported			As Revised
Other noncurrent liabilities	$	2,377	(1)	$	2,515	(1)
Redeemable common stock		5,000			—
Additional paid-in capital		433,996			438,858

⁽¹⁾ Includes long-term deferred tax liabilities of $653 to conform to the September 30, 2013 presentation.