Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended							3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Stock Options, RSAs, RSUs, And PSUs [Member] Minimum [Member]	Dec. 31, 2012 Stock Options, RSAs, RSUs, And PSUs [Member] Maximum [Member]	Dec. 31, 2012 Stock Options [Member] Maximum [Member]	Dec. 31, 2012 DOD Grants [Member]	Dec. 31, 2011 DOD Grants [Member]	Sep. 30, 2010 HemoStase Inventory [Member]
Advertising expense	$ 1,500,000	$ 948,000	$ 846,000
ESPP, percentage of discounted price from market price	85.00%
Vesting period							1 year	3 years
Period within grant date stock options granted typically expire									7 years
Quarterly cash dividend paid per share of common stock outstanding	$ 0.025
Cash and cash equivalents	13,009,000	21,705,000	35,497,000	30,121,000						668,000	1,200,000
Allowance for doubtful accounts	528,000	412,000
Write-downs to deferred preservation costs	195,000	270,000	187,000
Write-down to inventory	$ 77,000	$ 0	$ 1,900,000									$ 1,600,000
Estimated useful lives					3 years	10 years