CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $)	12 Months Ended
Dec. 31, 2014
Licenses capitalized pay for purchases of property, building and equipment	$ 2,700,000
Treasury Stock [Member]
Treasury shares redeemed to pay income tax	$ 945,000

The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration