The number of warrants or rights issued during period.

No definition available.

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Number of common shares into which each unit may be converted.

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No definition available.

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Number of common warrants into which each unit may be converted.

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No definition available.

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Number of pre-funded warrants into which each unit may be converted.

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No definition available.

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The interest amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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No definition available.

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The principal amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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No definition available.

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Represents number of units exercised.

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No definition available.

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Represents number of units issued.

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No definition available.

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Options prices in terms of fair market value.

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No definition available.

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The net cash inflow from the additional capital contribution to the entity after payment for issuance costs.

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The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement, net of offering costs.

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No definition available.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity, net of offering expenses.

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Represents the amount of cash awards of shares issued during the period.

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No definition available.

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Represents the aggregate amount of issuable cash awards of shares.

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Represents the term of expiration for options exercisable from the date of termination before a modification of the share-based compensation agreement.

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Number of share options subject to approval of amendment plan.

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Represents the price per units issued.

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No definition available.

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Per warrant amount of warrants issued.

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No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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No definition available.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Aggregate number of common shares reserved for future issuance.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Number of share instruments newly issued under a share-based compensation plan.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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Number of shares for which recognition of compensation cost was accelerated.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Per share or per unit amount of equity securities issued.

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For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

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Number of new stock issued during the period.

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Number of share options (or share units) exercised during the current period.

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Note 10 - Stockholders' Equity (Details Textual) - USD ($)												1 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 14, 2018	Aug. 28, 2018	May 18, 2018	Mar. 28, 2018	Dec. 29, 2017	Dec. 01, 2017	Jul. 01, 2017	Aug. 22, 2016	Aug. 03, 2016	Jul. 26, 2016	Jul. 07, 2016	Jun. 30, 2018	Jul. 31, 2016	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2017	Jun. 22, 2018	May 05, 2017
Stock Issued During Period, Shares, New Issues				609,636		898,402			600,000
Shares Issued, Price Per Share				$ 2.27		$ 3			$ 4.10
Class of Warrant or Right, Issued During Period																	15,128,151
Payments of Stock Issuance Costs			$ 680,000	$ 171,000		$ 327,000			$ 369,000
Units Issued, Price per Unit			$ 0.60
Proceeds from Issuance or Sale of Equity, Total			$ 5,500,000
Proceeds from Issuance or Sale of Equity, Net			$ 4,820,000
Proceeds from Issuance of Common Stock, Net				$ 1,213,000		2,368,000			$ 2,092,000							$ 2,368,000	$ 6,629,000	$ 2,092,000
Proceeds from Issuance of Common Stock						$ 2,700,000
Allocated Share-based Compensation Expense, Total																$ 291,000	$ 652,000	$ 1,461,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance																1,156,027	3,023,639
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																	2,233,500
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price																	$ 0.40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value																$ 8,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value																$ 2.36	$ 0.32	$ 2.16
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost														$ 94,000	$ 539,000
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	2,140,000				300,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0.2979				$ 3
Share-based Compensation Arrangements by Share-based Payment Award, Options, Subject to Approval of Amendment Plan	1,699,333
Principal Financial and Accounting Officer [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0.2979
Employee Stock Option [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options																	$ 1,202,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition																	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value																$ 209,000	$ 633,000	$ 572,000
Employee Stock Option [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years				5 years
Employee Stock Option [Member] \| Former Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number														16,248	72,496
Employee Stock Option [Member] \| Principal Financial and Accounting Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Restricted Stock Units (RSUs) [Member]
Shares Paid for Tax Withholding for Share Based Compensation																16,456		145
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period																69,278	416	125,513
Restricted Stock Units (RSUs) [Member] \| Former Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number														15,914	79,720
Share-based Compensation Arrangement by Share-based Payment Award, Pre-Modification of Agreement																90 years
Short Term Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period										98,417			118,288
Shares Paid for Tax Withholding for Share Based Compensation													46,879
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized											104,000
Share-based Compensation Arrangement by Share-based Payment Award, Aggregate Amount of Issuable Cash Award											$ 276,000
Share-based Compensation Arrangement by Share-based Payment Award, Amount of Cash Award Issued in Period										$ 266,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period							46,781			51,636
Amended 2016 Plan [Member
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	3,950,000																		1,325,000	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																	901,100
Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																	25,000
Common Stock, Capital Shares Reserved for Future Issuance																	2,444
Plan 2012 [Member] \| Employee Stock Option [Member]
Options Prices In Terms Of Fair Market Value																	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period																	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																	1 year
2006 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance																	62,676
Equity Incentive Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					1,000,000
Common Stock, Capital Shares Reserved for Future Issuance																	775,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross					280,000
The 2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross											156,100
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price											$ 2.86
The 2016 Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period											7 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period											3 years
Convertible Debt [Member] \| Boyalife Investment Inc. [Member]
Debt Conversion, Original Debt Principal, Amount								$ 12,500,000
Debt Conversion, Original Debt Interest, Amount								$ 8,250,000
Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 0.60
Warrants and Rights Outstanding, Term			5 years
Warrants Issused in Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 2.68
Warrants and Rights Outstanding, Term				5 years 182 days
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				304,818
Units [Member]
Number of Units Issued			6,475,001
Convertible Units, Number of Common Shares Called by Each Unit			1
Convertible Units, Number of Common Warrants Called by Each Unit			1
Units [Member] \| Common Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right			1
Pre-funded Units [member]
Number of Units Issued			2,691,666
Convertible Units, Number of Common Warrants Called by Each Unit			1
Convertible Units, Number of Pre-funded Warrants Called by Each Unit			1
Number of Units Exercised												2,691,666
Pre-funded Units [member] \| Common Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right			1
Pre-funded Units [member] \| Pre-funded Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right			1
Common Stock [Member]
Stock Issued During Period, Shares, New Issues																898,402	8,084,637	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																5,333
Common Stock [Member] \| Convertible Debt [Member] \| Boyalife Investment Inc. [Member]
Debt Conversion, Converted Instrument, Shares Issued								6,102,941
Private Placement [Member]
Stock Issued During Period, Shares, New Issues		1,000,000
Shares Issued, Price Per Share		$ 0.18
Class of Warrant or Right, Issued During Period		2,965,000
Warrants Issued, Price Per Warrant		$ 0.17
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right		1
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.01
Proceeds from Issuance of Private Placement		$ 684,000
Proceeds from Issuance of Private Placement, Net		623,000
Payments of Stock Issuance Costs		$ 61,000