Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Accounts Receivable
Accounts receivable	$ 7,069	$ 5,785
Accounts Receivable. | Accounts receivable balances | AmerisourceBergen Drug Corporation.
Customers representing greater than 10% of accounts receivable balances
Accounts receivable by major customer (as a percent)	53.00%	65.00%
Accounts Receivable. | Accounts receivable balances | McKesson Corporation
Customers representing greater than 10% of accounts receivable balances
Accounts receivable by major customer (as a percent)	18.00%	10.00%
Accounts Receivable. | Accounts receivable balances | Cardinal Health, Inc
Customers representing greater than 10% of accounts receivable balances
Accounts receivable by major customer (as a percent)	14.00%	14.00%
Accounts Receivable. | Accounts receivable balances | Metro Medical Supply, Inc
Customers representing greater than 10% of accounts receivable balances
Accounts receivable by major customer (as a percent)		18.00%
Accounts Receivable. | Accounts receivable balances | Metro Medical Supply, Inc | Maximum
Customers representing greater than 10% of accounts receivable balances
Accounts receivable by major customer (as a percent)	10.00%
Accounts Receivable. | Minimum
Customers representing greater than 10% of accounts receivable balances
Percentage required for qualification as major customer (as a percent)	10.00%	10.00%