Consolidated Statements of Cash Flows - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES      
Net loss $ (20,184,000) $ (16,643,000) $ (12,373,000)
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation 1,503,000 810,000 311,000
Amortization 159,000 28,000 15,000
Provision for bad debts 413,000 215,000 0
Stock-based compensation 2,834,000 3,835,000 735,000
Stock-based research and development/general and administrative expenses 0 0 427,000
Change in fair value of contingent consideration liability (269,000) (198,000) 0
Change in fair value of warrant liability (35,000) (417,000) (4,633,000)
Amortization of loan guarantee, financing fees and debt issuance costs 8,000 311,000 1,195,000
Accretion of discount on debt 0 0 585,000
Loss in equity-method investment 707,000 940,000 12,000
Loss on conversion of debt to equity 0 0 6,850,000
Deferred initial public offering costs expensed 0 0 618,000
Change in working capital components:      
Accounts receivable (1,662,000) (1,657,000) (717,000)
Other current assets (384,000) (199,000) (375,000)
Other non-current assets (101,000) 0 0
Accounts payable, accrued expenses and deferred revenue 3,114,000 675,000 (731,000)
Deferred rent and other (33,000) (38,000) 6,000
Net cash (used in) operating activities (13,599,000) (12,338,000) (8,075,000)
CASH FLOWS FROM INVESTING ACTIVITIES      
Purchase of fixed assets (1,008,000) (1,374,000) (257,000)
(Increase) decrease in restricted cash 6,000,000 (6,000,000) (50,000)
Patent costs (137,000) (130,000) (92,000)
Investment in joint venture 0 (1,000,000) (1,000,000)
Cash used in acquisition of Gentris, net of cash received 0 (3,181,000) 0
Cash from acquisition of BioServe 0 312,000 0
Cash used in acquisition of Response Genetics (7,495,000) 0 0
Net cash (used in) investing activities (2,640,000) (11,373,000) (1,399,000)
CASH FLOWS FROM FINANCING ACTIVITIES      
Principal payments on capital lease obligations (83,000) (44,000) (17,000)
Payment of equity issuance costs (117,000) 0 0
Proceeds from public offerings of common stock, net of offering costs 10,353,000 0 61,517,000
Proceeds from warrant exercises 1,000 178,000 192,000
Proceeds from option exercises 23,480 79,018 1,640
Payment of debt issuance costs (33,000) 0 0
Principal payments on notes payable 0 (408,000) (3,580,000)
Net cash provided by (used in) financing activities 10,144,000 (195,000) 58,114,000
Net increase (decrease) in cash and cash equivalents (6,095,000) (23,906,000) 48,640,000
CASH AND CASH EQUIVALENTS      
Beginning 25,554,000 49,460,000 820,000
Ending 19,459,000 25,554,000 49,460,000
SUPPLEMENTAL CASH FLOW DISCLOSURE      
Cash paid for interest 240,000 128,000 608,000
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES      
Fixed assets acquired through capital lease arrangements 0 42,000 354,000
Warrants issued for financing fees 0 0 47,000
Retirement of treasury stock 0 0 17,000
Conversion of notes payable and lines of credit to common stock 0 0 9,634,000
Value of shares issued as partial consideration to acquire businesses 0 1,516,000 0
Reclassification of derivative warrants 0 0 7,170,000
Cashless exercise of derivative warrants 0 125,000 420,000
Offering costs discounted 0 0 733,000
Net tangible assets acquired via acquisition 2,843,000 1,255,000 0
Accrued expenses reclassified as derivative warrant liability 0 0 221,000
BioServe      
Adjustments to reconcile net loss to net cash used in operating activities:      
Change in fair value of contingent consideration liability 269,000 (198,000) 0
Gentris Corporation      
Adjustments to reconcile net loss to net cash used in operating activities:      
Change in fair value of contingent consideration liability (207,000) 0 0
Response Genetics      
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES      
Value of shares issued as partial consideration to acquire businesses $ 5,436,000 $ 0 $ 0