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13. Parent Company Financial Statements (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation $ 747 $ 938
Changes in assets and liabilities:    
Prepaid expenses 28 (1,109)
Accounts payable (2,097) 2,020
Accrued interest expense 6,448 9,800
Net cash used in operating activities 371 (786)
Financing activities:    
Issuance of common stock for services, option and warrant exercises 0 23
Net cash provided by financing activities 1,627 816
Net increase (decrease) in cash and cash equivalents 1,203 (49)
Cash and cash equivalents at beginning of period 283 332
Cash and cash equivalents at end of period 1,486 283
Supplemental disclosures of cash flow information, cash paid:    
Income tax expense 6 6
Supplemental disclosures of cash flow information, non-cash transactions:    
Proceeds from exercise of stock options applied to accounts payable 0 21
Fair value of warrants issued to subordinated debt holders 579 1,087
Stock issued in connection with services and for interest on debt 0 432
Settlement of accounts payable through transfer of equipment 66 0
Parent Company Financial Statements    
Operating activities:    
Net loss   (27,138)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 747 938
Stock issued in connection with consultant services 0 204
Change in fair value of warrant liability (25) (54)
Changes in assets and liabilities:    
Subsidiary portion of net losses 10,272 22,669
Prepaid expenses 45 294
Accounts payable 293 (103)
Accrued interest expense 284 197
Other liabilities 104 120
Other assets 0 (31)
Net cash used in operating activities (3,916) (2,904)
Investing activities:    
Subsidiary advances, net 3,916 2,816
Net cash provided by investing activities 3,916 2,816
Financing activities:    
Issuance of common stock for services, option and warrant exercises 0 23
Net cash provided by financing activities 0 23
Net increase (decrease) in cash and cash equivalents 0 (65)
Cash and cash equivalents at beginning of period 0 65
Cash and cash equivalents at end of period 0 0
Supplemental disclosures of cash flow information, cash paid:    
Interest payments 4,894 6,824
Income tax expense 6 6
Supplemental disclosures of cash flow information, non-cash transactions:    
Proceeds from exercise of stock options applied to accounts payable 0 21
Fair value of warrants issued to subordinated debt holders 578 1,087
Repurchase of common stock on revolver loan advance 0 7,479
Stock issued in connection with services and for interest on debt 0 432
Settlement of accounts payable through transfer of equipment $ 66 $ 0