Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES:
Net loss	$ (3,490)	$ (3,686)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	86	228
Stock-based compensation	295	401
Change in allowance for doubtful accounts	138	35
Inventory write-down		246
Write-down of excess GABA inventory		178
Loss on disposal of fixed assets		155
Deferred income taxes		2
Other non-cash charges and credits		7
Changes in operating assets and liabilities:
Accounts receivable	(477)	(965)
Taxes receivable	483
Inventory	(732)	201
Prepaid expenses and other current assets	64	25
Other assets	23	74
Accounts payable	622	980
Accrued expenses	253	(436)
Taxes payable	(89)	37
Net cash used in operating activities	(2,824)	(2,518)
INVESTING ACTIVITIES:
Purchase of certificate of deposit, restricted	(183)
Redemption of certificate of deposit, restricted		376
Purchase of fixed assets	(173)	(16)
Sale of fixed assets	3
Net cash (used in) provided by investing activities	(353)	360
FINANCING ACTIVITIES:
Proceeds from issuance of common stock, net	2,185
Proceeds from capital lease obligation	122
Proceeds from exercise of stock options	17	60
Payments on capital lease obligations	(6)
Repayment of note payable		(345)
Net cash provided by (used in) financing activities	2,318	(285)
Net decrease in cash and cash equivalents	(859)	(2,443)
Effect of exchange rate changes on cash	39	(10)
Cash and cash equivalents, beginning of period	5,448	4,975
Cash and cash equivalents, end of period	4,628	2,522
Cash received (paid) during period for:
Interest	50	(5)
Income taxes	$ 361	$ 1