Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Accounts receivable, allowance for doubtful accounts	$ 42	$ 42
Shareholders' Equity:
Common stock, shares authorized	480,000,000	480,000,000
Common stock, shares, issued	122,770,217	126,773,097
Common stock, shares outstanding	122,770,217	126,773,097