Accounts Receivable

12 Months Ended

Dec. 31, 2011

Accounts Receivable [Abstract]

Accounts Receivable

(3) Accounts Receivable

Substantially all receivables are derived from sales and related services, support and maintenance of our products to healthcare IT providers, device manufacturers and pharmaceutical companies located throughout the U.S. and in certain foreign countries as indicated in Note 15.

Our accounts receivable balance is reported net of an allowance for doubtful accounts and an allowance for sales returns.  We provide for an allowance for estimated uncollectible accounts and sales returns based upon historical experience and management's judgment.  As of December 31, 2011 and 2010, the allowances for estimated uncollectible accounts and sales returns were $4,080 and $1,322, respectively.

The following table shows the changes in our allowance for doubtful accounts and sales returns.

	Balance at Beginning of Period		Net Additions Charged to Revenue and Expenses		Deductions			Balance at End of Period
For year ended December 31,:
2011	$	1,322	$	2,766	$	(8	)	$	4,080
2010		1,287		593		(558	)		1,322
2009		1,378		416		(507	)		1,287