Subsequent Events - Narrative (Details)			1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 10, 2020 USD ($) installment	Oct. 01, 2019 USD ($)	Mar. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Jan. 31, 2020 shares
Subsequent Event [Line Items]
Accrued dividends on Series A-2 Preferred Stock				$ 99,000	$ 99,000	$ 71,000
Revenues					$ 12,827,000	$ 12,557,000
Series C Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding (in shares) | shares				475	475	525
Preferred stock, stated value				$ 1,000	$ 1,000	$ 1,000
Series C Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, shares outstanding (in shares) | shares			325
Preferred stock, stated value			$ 325,000
Series A-2 Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding (in shares) | shares				32	32	32
Preferred stock, stated value				$ 7,500	$ 7,500	$ 7,500
Accrued dividends on Series A-2 Preferred Stock				$ 99,000	$ 99,000	$ 82,000
Convertible preferred stock, shares issued upon conversion (in shares) | shares				347	347
Series A-2 Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares) | shares							13.1524
Paycheck Protection Program Loan | Subsequent Event
Subsequent Event [Line Items]
Proceeds from issuance of debt	$ 2,416,600
Fixed rate	1.00%
Number of monthly installments | installment	18
SVB Loan Agreement | Term Loan Facility
Subsequent Event [Line Items]
Principal payment		$ 291,500
Fee amount		192,000,000
Deferral Fee | SVB Loan Agreement | Term Loan Facility
Subsequent Event [Line Items]
Fee amount		$ 100,000
Preferred Stock | Series C Preferred Stock
Subsequent Event [Line Items]
Conversion of convertible preferred stock, shares (in shares) | shares					50	1,225
Preferred Stock | Series C Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Conversion of convertible preferred stock, shares (in shares) | shares			150
Common Stock
Subsequent Event [Line Items]
Conversion of convertible preferred stock, shares (in shares) | shares					44,000	542,000
Common Stock | Series C Preferred Stock
Subsequent Event [Line Items]
Conversion of convertible preferred stock, shares (in shares) | shares					16,667	408,333
Common Stock | Series C Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Conversion of convertible preferred stock, shares (in shares) | shares			50,000
Revenue
Subsequent Event [Line Items]
Percentage of revenue					100.00%	100.00%
Major Customer | Professional and other services
Subsequent Event [Line Items]
Revenues				$ 700,000
Major Customer | Revenue | Professional and other services
Subsequent Event [Line Items]
Percentage of revenue				13.00%	6.00%