Debts (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2020

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of promissory note obligation

The Company’s promissory note obligation at March 31, 2020 and December 31, 2019 consists of the following (in thousands):

			Stated Value at
	Interest Rate	Due Date	March 31, 2020		December 31, 2019
Yaskawa Note	1.00%	September 2022	$	15,373	$	15,336

The Company’s promissory note obligation at December 31, 2019 and 2018 consists of the following (in thousands):

			Stated Value at December 31,
	Interest Rate	Due Date	2019		2018
Yaskawa Note	1.00%	September 2022	$	15,336	$	15,186

Schedule of fair value option

As of March 31, 2020 and December 31, 2019, the Company determined the fair value for the note, as compared to the face value, including accrued interest, as follows (in thousands):

	Fair Value at
	March 31, 2020		December 31, 2019
Yaskawa Note	$	13,885	$	16,169

Pursuant to ASC 825-10-15-4, the Company elected to apply the fair value option for the promissory note. As of December 31, 2019 and 2018, the Company determined the fair value for the note, as compared to the face value, including accrued interest, as follows (in thousands):

	Fair Value at December 31,
	2019		2018
Yaskawa Note	$	16,169	$	15,852

Schedule of maturities of long-term debt

As of March 31, 2020, the scheduled maturity on the development loans, revolving credit facility and promissory note was as follows (in thousands):

Year Ending December 31,	Amount
2020	$	15,610
2021	10,000
2022	15,748
Total	$	41,358

As of December 31, 2019, the scheduled maturity on the development loans, revolving credit facility and promissory note was as follows (in thousands):

Year Ending December 31,	Amount
2020	$	15,458
2021	10,000
2022	15,748
Total	$	41,206