Stock-Based Compensation and Stock Options (Details) $ / shares in Units, $ in Thousands				1 Months Ended				3 Months Ended		12 Months Ended
	Apr. 26, 2024 $ / shares shares	Jun. 01, 2021 employee $ / shares shares	May 29, 2020 employee $ / shares shares	Mar. 31, 2023 $ / shares shares	Jun. 30, 2022 extension $ / shares shares	Mar. 31, 2022 $ / shares shares	Sep. 30, 2019 employee $ / shares shares	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 USD ($)	Dec. 31, 2023 shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 shares	Dec. 31, 2020 shares
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Number of key employees | employee		1
Share purchase amount of options granted		50,000
Exercise price (in dollars per share) | $ / shares		$ 9.44
Options outstanding (in shares)								50,000
Total stock-based compensation expense (reversal) | $								$ 36	$ 36
Options vested (in shares)								37,500
Unrecognized stock-based compensation expense | $								$ 107
Expected duration for recognition of stock based compensation expense								9 months 18 days
Stock Options | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award
Vesting percentage	25.00%
Vesting period	6 months
Award vesting period	2 years
Stock Options | September 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted							300,000
Exercise price (in dollars per share) | $ / shares							$ 10.79
Options vest (in shares)							75,000
Stock Options | May 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted			100,000									88,917	54,258
Shares issued upon exercise of options (in shares)			300,000
Options forfeited (in shares)												125,000	100,000
Share-based compensation options were exercised (in shares)												150,000
Stock Options | May 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Options forfeited (in shares)											50,000
Share-based compensation arrangement by share-based payment award, options, vested and exercisable in future periods, number of shares											25,000
Stock Options | March 2022 plan
Share-based Compensation Arrangement by Share-based Payment Award
Total stock-based compensation expense (reversal) | $									216
Vesting period						6 months
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number								600,000
Stock Options | June 2022 plan
Share-based Compensation Arrangement by Share-based Payment Award
Total stock-based compensation expense (reversal) | $								$ 0	30		$ 0
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number								100,000
Number of extensions | extension					3
Performance target extension period								3 months
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested, number								33,333			0
Stock Options | March 2023
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted				200,000
Exercise price (in dollars per share) | $ / shares				$ 4.96
Vesting percentage				12.50%
Vesting period				6 months
Award vesting period				4 years
Stock Options | March 2024
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted								200,000
Total stock-based compensation expense (reversal) | $								$ 35	$ 17
Options vested (in shares)								50,000
Unrecognized stock-based compensation expense | $								$ 382
Expected duration for recognition of stock based compensation expense								2 years 9 months 18 days
Stock Options | March 2024 | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award
Exercise price (in dollars per share) | $ / shares	$ 8.58
Employee Stock | September 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted										16,619
Share-based compensation options were exercised (in shares)										50,000
Employee Stock | May 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted								27,546		18,098
Share-based compensation arrangement by share-based payment award, options, vested and exercisable in future periods, number of shares													75,000
Share-based compensation options were exercised (in shares)								75,000		50,000	0
Employee Stock | March 2022 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted						600,000
Exercise price (in dollars per share) | $ / shares						$ 8.14
Vesting percentage						25.00%
Award vesting period						2 years
Employee Stock | June 2022 plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted					100,000
Exercise price (in dollars per share) | $ / shares					$ 6.78
Unrecognized stock-based compensation expense | $								$ 239
Expected duration for recognition of stock based compensation expense								1 year 3 months 18 days
Key Employees | Stock Options | September 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of key employees | employee							6
Share purchase amount of options granted							50,000
Key Employees | Stock Options | May 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of key employees | employee			2
Share purchase amount of options granted			200,000									24,474
Exercise price (in dollars per share) | $ / shares			$ 3.49
Share-based compensation options were exercised (in shares)												50,000
Options outstanding (in shares)								25,000
Total stock-based compensation expense (reversal) | $								$ 25
Key Employees | Stock Options | May 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted											4,676
Mr. Ralph Bartel | Stock Options | May 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted			800,000							121,307		390,809
Share-based compensation options were exercised (in shares)										200,000		600,000
Holger Bartel | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award
Share purchase amount of options granted	600,000