CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 45,301	$ 31,144
Short-term investments	12,111	2,522
Prepaid expenses and other current assets	1,276	1,914
Total current assets	58,688	35,580
Property and equipment, net	835	1,235
Other assets	3,568	9,465
Total assets	63,091	46,280
Current liabilities:
Accounts payable	191	0
Accrued expenses	4,994	11,606
Current portion of long-term debt	5,658	4,812
Other current liabilities	3,676	2,070
Total current liabilities	14,519	18,488
Long-term debt, less current portion	0	4,455
Other liabilities	1,753	5,407
Total liabilities	16,272	28,350
Commitments and contingencies
Stockholders' equity:
Common stock, $0.001 par value per share:	74	58
Additional paid-in capital	2,359,747	2,299,186
Accumulated other comprehensive income	3	0
Accumulated deficit	(2,313,005)	(2,275,556)
Total CTI stockholders' equity	46,819	23,688
Noncontrolling interest	0	(5,758)
Total stockholders' equity	46,819	17,930
Total liabilities and stockholders' equity	63,091	46,280
Series O Preferred Stock
Stockholders' equity:
Preferred stock, $0.001 par value per share:	0	0
Series X Preferred Stock
Stockholders' equity:
Preferred stock, $0.001 par value per share:	$ 0	$ 0