Nature Of Operations And Summary Of Significant Accounting Policies (Narrative) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) item customer shares	Mar. 31, 2019 USD ($) shares	Dec. 31, 2019 USD ($) customer shares	Apr. 17, 2020 employee	Dec. 31, 2018 USD ($)	Apr. 18, 2018 USD ($)	Mar. 23, 2018 USD ($)
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of operating subsidiaries | item	2
Cash and cash equivalents	$ 4,904,000	$ 459,000	$ 5,969,000		$ 991,000
Net cash used in operating activities	1,030,000	1,070,000
Net loss	(891,000)	(796,000)
Revenue	2,792,000	2,824,000
Slotting fees and promotion allowances	$ 297,000	328,000
Customers payment from receipt of invoice period	30 days
Allowances for doubtful accounts	$ 99,000		44,000
Impairment losses	0		$ 0
Shipping and Handling [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Revenue	$ 7,000	32,000
Subsequent Event [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of employees terminate | employee				9
Number of employees furlough | employee				4
Maximum [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Discounts for certain customers for payments made within 15 days	2.00%
Convertible Notes [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Aggregate principal amount		$ 125,000				$ 2,920,000	$ 2,920,000
Warrant [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive shares | shares	15,000,000	0
One Major Customer [Member] | Outstanding Accounts Receivable [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of customers | customer	1
Customer, percentage	17.00%
Two Major Customers [Member] | Outstanding Accounts Receivable [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of customers | customer			2
Customer, percentage			26.00%
Stock Options [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stock options outstanding, shares | shares	3,969,952	3,890,184	3,495,601
Convertible Stock [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Shares issuable upon conversion of convertible notes | shares	5,164,212	9,244,627
Restricted Stock [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Unvested restricted stock units, shares | shares	30,304	490,300	149,824