15. Stock repurchase program	12 Months Ended
Dec. 31, 2013
Disclosure Text Block Supplement [Abstract]
Treasury Stock [Text Block]	15. Stock repurchase program Prior to its expiration on May 27, 2013, we maintained a stock repurchase program (the “Stock Repurchase Program”) whereby we were authorized to repurchase up to $15,000,000, as increased from $10,000,000 in March 2012, of our outstanding shares of common stock from time to time in the open market, depending on market conditions, share price and other factors. The Stock Repurchase Program expired on May 27, 2013 and was not renewed. We use the cost method to account for treasury stock purchases, under which the price paid for the stock is charged to the treasury stock account. Repurchases of our common stock are accounted for as of the settlement date. From January 1, 2013 through the expiration date of the Stock Repurchase Program, we repurchased 114,161 shares of common stock for approximately $887,000, at an average price of $7.77 per share. In addition to shares repurchased under the Stock Repurchase Program, during the year ended December 31, 2013, we repurchased 490,000 shares of our common stock for approximately $4,307,000 at an average price per share of $8.79 in an open-market transaction. From January 1, 2005 through December 31, 2013, we repurchased a total of 2,787,038 shares of common stock for approximately $22,527,000 under all of our stock repurchase programs, at an average price of $8.08 per share. At December 31, 2013, no additional shares are authorized for future repurchases due to the expiration of the Stock Repurchase Program.

Prior to its expiration on May 27, 2013, we maintained a stock repurchase program (the “Stock Repurchase Program”) whereby we were authorized to repurchase up to $15,000,000, as increased from $10,000,000 in March 2012, of our outstanding shares of common stock from time to time in the open market, depending on market conditions, share price and other factors. The Stock Repurchase Program expired on May 27, 2013 and was not renewed. We use the cost method to account for treasury stock purchases, under which the price paid for the stock is charged to the treasury stock account. Repurchases of our common stock are accounted for as of the settlement date. From January 1, 2013 through the expiration date of the Stock Repurchase Program, we repurchased 114,161 shares of common stock for approximately $887,000, at an average price of $7.77 per share. In addition to shares repurchased under the Stock Repurchase Program, during the year ended December 31, 2013, we repurchased 490,000 shares of our common stock for approximately $4,307,000 at an average price per share of $8.79 in an open-market transaction. From January 1, 2005 through December 31, 2013, we repurchased a total of 2,787,038 shares of common stock for approximately $22,527,000 under all of our stock repurchase programs, at an average price of $8.08 per share. At December 31, 2013, no additional shares are authorized for future repurchases due to the expiration of the Stock Repurchase Program.