Capital Stock (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2011
Capital Stock [Line Items]
Common Stock, Shares Authorized	75,000,000	75,000,000
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Common Stock, Capital Shares Reserved for Future Issuance	5,246,000
Treasury Stock, Shares, Acquired	137,000
Stockholder Rights Exercisable Description	Person becomes an Acquiring Person (unless such Person acquires 50 percent or more of the common stock of the Company then outstanding, as more fully described in the Rights Agreement), the Board of Directors may exchange one share of the Company’s common stock for each outstanding Right (other than rights owned by such Person, which would have become void). In addition, if the Company is acquired in a merger or other business combination transaction after a Person becomes an Acquiring Person, all holders of Rights, except the Acquiring Person, may purchase at the Right’s then-current exercise price, a number of the acquiring Company’s common stock having a market value of twice the exercise price. If the Company receives a “qualifying offer” (which includes certain all-cash fully financed tender offers or exchange offers for all of the Company’s outstanding common stock), under certain circumstances, holders of 10 percent of the Company’s outstanding common stock (excluding stock held by the offeror and its affiliates and associates) may direct the Board of Directors to call a special meeting of stockholders to consider a resolution exempting such “qualifying offer” from the Rights Agreement.
Stockholders Rights Agreement Expiration Date	Jan. 13, 2019
Board of Directors [Member]
Capital Stock [Line Items]
Stock Repurchase Program, Authorized Amount			$ 2.0
Stockholders Rights Agreement [Member]
Capital Stock [Line Items]
Equity Method Investment, Ownership Percentage	20.00%
Preferred Stock, Redemption Price Per Share	$ 0.001