RESTRUCTURING (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
Jun. 30, 2013	Dec. 31, 2012
Restructuring Charges To Reserve Total		$ 2.5
Cash Payments Related To Restructuring Reserves	1.9
Restructuring Reserve Accrual Adjustment Total	$ 0.1

Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

No definition available.

Name:	chtp_RestructuringReserveAccrualAdjustmentTotal
Namespace Prefix:	chtp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration