Line of Credit	12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]
Line of Credit	LINE OF CREDIT On July 11, 2006, we entered into a loan agreement providing for an available line of credit of $30 million, which was most recently amended on March 15, 2012. Loans under the Amended and Restated Loan Agreement, as amended, bear interest at the rate of LIBOR plus a fixed percentage between 1.50% and 2.00%. The Amended and Restated Loan Agreement required us to maintain a minimum cash balance of $25 million and tangible net worth measured at the end of each of our fiscal quarters. The term of the Amended and Restated Loan Agreement, as amended, expired on March 31, 2015. We did not extend the loan agreement and we did not draw on this line of credit in 2015 or 2014.

Line of Credit

12 Months Ended

Dec. 31, 2016

LINE OF CREDIT

On July 11, 2006, we entered into a loan agreement providing for an available line of credit of $30 million, which was most recently amended on March 15, 2012. Loans under the Amended and Restated Loan Agreement, as amended, bear interest at the rate of LIBOR plus a fixed percentage between 1.50% and 2.00%. The Amended and Restated Loan Agreement required us to maintain a minimum cash balance of $25 million and tangible net worth measured at the end of each of our fiscal quarters. The term of the Amended and Restated Loan Agreement, as amended, expired on March 31, 2015. We did not extend the loan agreement and we did not draw on this line of credit in 2015 or 2014.