Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 40,460	$ 46,519
Restricted cash	293
Accounts receivable, net	127	333
Product inventories, net	8,926	7,220
Prepaid expenses and other current assets	2,239	2,240
Total current assets	52,045	56,312
Property, plant and equipment, net	6,575	6,870
Patents, net	331	350
Total Assets	58,951	63,532
LIABILITIES AND STOCKHOLDERS' EQUITY
Trade accounts payable	5,984	5,870
Accrued salaries and benefits	875	1,132
Accrued warranty	364	354
Accrued liabilities	452	421
Deferred revenues	2,008	1,616
Warrant liabilities	577	654
Current portion of long-term debt	5	12
Total current liabilities	10,265	10,059
Total Liabilities	10,265	10,059
Common stock, no par value, unlimited shares authorized; 69,452,487 shares issued and outstanding at March 31, 2012 and December 31, 2011	245,617	245,617
Additional paid in capital	12,351	12,279
Accumulated deficit	(209,282)	(204,423)
Total stockholders' equity	48,686	53,473
Total Liabilities and Stockholders' Equity	$ 58,951	$ 63,532