4. Business Combinations and Other Acquisitions (Details) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 06, 2013
As Initially Reported [Member]
Consideration
Shares of Pernix common stock issued to Somaxon' stockholders	3,665
Pernix common stock price	$ 6.26
Fair value of common stock issued	$ 22,945
Fair value of warrants	895
Total consideration	23,840
Estimated Fair Value of Liabilities Assumed:
Current liabilities	8,764
Long-term liabilities	3,403
Long-term deferred tax liability	11,342
Amount attributable to liabilities assumed	23,509
Total purchase price plus liabilities assumed	47,349
Estimated Fair Value of Assets Acquired:
Current assets, excluding inventory	4,782
Inventory	1,090
Intangible assets	30,729
Amount attributable to assets acquired	36,601
Goodwill	10,748
Period Adjustments [Member]
Consideration
Shares of Pernix common stock issued to Somaxon' stockholders
Pernix common stock price
Fair value of common stock issued
Fair value of warrants
Total consideration
Estimated Fair Value of Liabilities Assumed:
Current liabilities	1,607
Long-term liabilities
Long-term deferred tax liability	111
Amount attributable to liabilities assumed	1,718
Total purchase price plus liabilities assumed	1,718
Estimated Fair Value of Assets Acquired:
Current assets, excluding inventory
Inventory
Intangible assets	300
Amount attributable to assets acquired	300
Goodwill	1,418
As Adjusted [Member]
Consideration
Shares of Pernix common stock issued to Somaxon' stockholders	3,665
Pernix common stock price	$ 6.26
Fair value of common stock issued	22,945
Fair value of warrants	895
Total consideration	23,840
Estimated Fair Value of Liabilities Assumed:
Current liabilities	10,371
Long-term liabilities	3,403
Long-term deferred tax liability	11,453
Amount attributable to liabilities assumed	25,227
Total purchase price plus liabilities assumed	49,067
Estimated Fair Value of Assets Acquired:
Current assets, excluding inventory	4,782
Inventory	1,090
Intangible assets	31,029
Amount attributable to assets acquired	36,901
Goodwill	$ 12,166