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Note 4 - Restricted Short-Term Investments	6 Months Ended
Note 4 - Restricted Short-Term Investments	Jun. 30, 2012
Restricted Assets Disclosure [Text Block]	4. Restricted Short-Term Investments As of June 30, 2012 and December 31, 2011, restricted short-term investments consisted of $1.0 million and $0 respectively. The $1.0 million is used as collateral for a letter of credit of the same amount which secures the Company’s obligations under the office space lease for IPC’s corporate headquarters.