Note H - Supply Arrangement (Details Textual) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Number of Manufacturing Arrangement	1
Supply Arrangement, Automatic Renewal Period	2 years
Supply Arrangement, Period of Prior Notice	1 year
Supply Arrangement Expense	$ 0	$ 0	$ 0

Period for which the supply arrangement automatically renews unless either party to the contract provides prior notice.

No definition available.

Name:	kmph_SupplyArrangementAutomaticRenewalPeriod
Namespace Prefix:	kmph_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration