Selected Balance Sheet Information

3 Months Ended

12 Months Ended

Mar. 31, 2012

Dec. 31, 2011

Disclosure Text Block Supplement [Abstract]

Supplemental Balance Sheet Disclosures [Text Block]

5.   Selected Balance Sheet Information 

Accounts receivable consisted of the following at March 31, 2012 and December 31, 2011 (in thousands):

	March 31, 2012			December 31, 2011
Accounts receivable	$	736		$	692
Bad debt allowance - customer		(296	)		(287	)
Accounts receivable, net	$	440		$	405

Property and Equipment consisted of the following at March 31, 2012, and December 31, 2011 (in thousands) :

	March 31, 2012			December 31, 2011
Manufacturing equipment	$	400		$	400
Computer and office equipment		159			159
Laboratory equipment		136			136
Total		695			695
Less accumulated depreciation		(392	)		(372	)
Property and equipment, net	$	303		$	323

Depreciation expense for the three months ended March 31, 2012 and 2011 was $20,000 and $80,000, respectively.

4. Selected Balance Sheet Information

Accounts receivable (in thousands)

	December 31,
	2011			2010
Accounts receivable	$	692		$	472
Bad debt allowance - customer		(287	)		(133	)
Total	$	405		$	339

 Other current assets (in thousands)

	December 31,
	2011		2010
Grant receivable	$	-	$	320
Prepaid expenses		16		23
Total	$	16	$	343

Property and equipment (in thousands) 

	December 31,
	2011			2010
Leasehold improvements	$	-		$	863
Manufacturing equipment		400			333
Computer and office equipment		159			160
Laboratory equipment		136			214
		695			1,570
Less accumulated depreciation		(372	)		(1,095	)
Total	$	323		$	475

Accrued expenses (in thousands) 

	December 31,
	2011		2010
Accrued vendor payments	$	1	$	105
Bonus		-		100
Compensation		28		5
Total	$	29	$	210