Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 28, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 312,451	$ 54,271
Accounts receivable	34,482	12,626
Inventory	60,270	30,257
Prepaid expenses and other current assets	11,742	5,672
Total current assets	418,945	102,826
Property, plant, and equipment, net	35,050	30,527
Other non-current assets, net	846	396
Total assets	454,841	133,749
Current liabilities:
Accounts payable	38,348	17,247
Wages payable	1,433	1,255
Accrued bonus	3,181	2,312
Accrued expenses and other current liabilities	4,113	2,391
Short-term borrowings under revolving credit line and bank term loan	9,087	0
Short-term capital lease liabilities	30	44
Stock warrant liability	0	1,918
Total current liabilities	56,192	25,167
Long-term liabilities:
Revolving credit line	0	6,000
Long-term portion of bank term loan, net	16,503	19,388
Equipment loan, net	4,922	5,000
Capital lease obligations and other long-term liabilities	396	404
Total long-term liabilities	21,821	30,792
Commitments and Contingencies (Note 9)
Convertible preferred stock:
Convertible preferred stock	0	199,540
Stockholders’ equity (deficit):
Preferred stock, par value $0.0001 per share—500,000 shares authorized, none issued and outstanding	0	0
Common stock, par value $0.0001 per share—500,000,000 shares and 58,669,600 shares authorized at September 28, 2019 and December 31, 2018, respectively; 60,565,840 and 6,951,350 shares issued and outstanding at September 28, 2019 and December 31, 2018, respectively	6	1
Additional paid-in capital	518,485	7,921
Accumulated deficit	(141,663)	(129,672)
Total stockholders’ equity (deficit)	376,828	(121,750)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	454,841	133,749
Series A
Convertible preferred stock:
Convertible preferred stock	0	2,000
Series B
Convertible preferred stock:
Convertible preferred stock	0	4,999
Series C
Convertible preferred stock:
Convertible preferred stock	0	14,882
Series D
Convertible preferred stock:
Convertible preferred stock	0	24,948
Series E
Convertible preferred stock:
Convertible preferred stock	0	17,214
Series F
Convertible preferred stock:
Convertible preferred stock	0	29,840
Series G
Convertible preferred stock:
Convertible preferred stock	0	55,658
Series H
Convertible preferred stock:
Convertible preferred stock	$ 0	$ 49,999