Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Tax Credit Carryforward [Line Items]
Effective income tax rate	16.00%	31.00%	34.00%
Federal statutory income tax rate	34.00%	35.00%	35.00%
Valuation allowances against deferred tax assets	$ 2,145,000	$ 1,532,000
Net deferred tax asset	21,869,000	22,047,000
Federal net operating loss carryforwards related to the acquisitions of Cardiogenesis and Hemosphere	11,000,000
State net operating loss carryforwards	3,100,000
Research and development tax credit carryforwards	459,000
Total uncertain tax liability including interest and penalties	1,800,000	2,500,000
Uncertain tax liability recorded as reduction to deferred tax assets	108,000
Uncertain tax liability recorded to non-current liability	1,700,000
Approximate amount of uncertain tax liability to be recognized in 2015	940,000
Texas Tax Credit [Member]
Tax Credit Carryforward [Line Items]
Other tax credit	$ 158,000