Accounts Receivable, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Accounts Receivable, Net
Accounts receivable	6,410	5,932
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)	48.00%	44.00%
Accounts Receivable. | Accounts receivable balances | McKesson Corporation
Customers representing greater than 10% of accounts receivable balances
Accounts receivable by major customer (as a percent)	28.00%	33.00%
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)	18.00%	15.00%