Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 33,184	$ 71,639
Accounts receivable	613	235
Inventory	5,020	5,074
Prepaid expenses and other current assets	3,433	3,567
Total current assets	42,250	80,515
Property and equipment, net	5,000	5,478
Other assets	8,006	7,730
Total assets	55,256	93,723
Current liabilities:
Accounts payable	6,444	5,051
Accrued expenses	11,906	9,469
Warrant liability		991
Current portion of deferred revenue	899	1,010
Current portion of long-term debt	4,152	3,155
Other current liabilities	393	393
Total current liabilities	23,794	20,069
Deferred revenue, less current portion	1,399	1,626
Long-term debt, less current portion	9,398	10,152
Other liabilities	6,092	5,657
Total liabilities	40,683	37,504
Commitments and contingencies
Common stock purchase warrants	7,890	13,461
Shareholders' equity:
Common stock, no par value: Authorized shares - 215,000,00 Issued and outstanding shares - 149,945,210 and 145,508,767 at June 30, 2014 and December 31, 2013, respectively	1,953,916	1,933,305
Accumulated other comprehensive loss	(8,440)	(8,429)
Accumulated deficit	(1,936,104)	(1,879,703)
Total CTI shareholders' equity	9,372	45,173
Noncontrolling interest	(2,689)	(2,415)
Total shareholders' equity	6,683	42,758
Total liabilities and shareholders' equity	$ 55,256	$ 93,723