Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Cash Flow (Unaudited) (Parenthetical)

v2.4.1.9
Consolidated Statements of Cash Flow (Unaudited) (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Supplemental disclosure of non-cash activities:  
Issuance of common and preferred stock under non cash activity $ 1.6wkhs_IssuanceOfStockUnderNonCashActivity