Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Shareholders Equity Warrants Outstanding (Details)

v3.8.0.1
Stockholders' Equity - Summary of Shareholders Equity Warrants Outstanding (Details) - Warrants [Member] - shares
shares in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Stock Holders Equity [Line Items]    
Total Warrants Outstanding, beginning 5,958 40,255
Warrants tendered on January 13, 2017   (30,966)
Warrants exercised first quarter (2,916)
Warrants exercised second quarter, 2017   (412)
Warrants exercised third quarter, 2017  
Warrants exercised fourth quarter, 2017   (3)
Total Warrants Outstanding, ending 5,958 [1] 5,958
[1] Weighted average of exercise price for outstanding warrants is $ 0.70