Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

v2.4.1.9
Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Cash and cash equivalents $ 165,766us-gaap_CashAndCashEquivalentsAtCarryingValue $ 160,203us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts payable 7,442us-gaap_AccountsPayableCurrent 7,698us-gaap_AccountsPayableCurrent
Common stock, par value (USD per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 33,333,333us-gaap_CommonStockSharesAuthorized 33,333,333us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 19,658,357us-gaap_CommonStockSharesIssued 19,575,150us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 19,658,357us-gaap_CommonStockSharesOutstanding 19,575,150us-gaap_CommonStockSharesOutstanding
Viking    
Cash and cash equivalents 327us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
756us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Accounts payable $ 2,397us-gaap_AccountsPayableCurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
$ 2,211us-gaap_AccountsPayableCurrent
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember